aads

The New York Times publishes fake news false hope in the form of a credulous account of dubious alternative medicine testimonials [Respectful Insolence]

[Editor’s note: Sorry this is a few hours late. I forgot to change the status from DRAFT to SCHEDULE in WordPress. D’oh!]

The single most persuasive strategies by which quacks sell their wares and believers in quackery persuade others to try the quackery they believe in is the personal anecdote. Indeed, I established very early on in the history of this blog a type of post that has become a staple that shows up several times a year. In these posts, I deconstruct “alternative cancer cure” testimonials, showing how the story as related doesn’t provide convincing evidence that the quackery being touted is actually responsible for how well the person who used it is doing and how the patient’s good fortune is usually due to previous conventional treatment and/or being a biological outlier. (There’s a reason why I frequently cite a 50-year-old paper showing that about 18% and 4% of women with completely untreated breast cancer are still alive at 5 and 10 years, respectively.) Don’t believe me? Click this link. It goes to one of the first posts I ever wrote, which has served as a template for similar posts for over 12 years.

Cancer quacks like Stanislaw Burzynski rely on these stories, so much so that there is an entire website devoted to showing how the vast majority of these patients were exploited and died anyway. The basic narrative is this. A person develops an incurable cancer. (In the case of Burzynski, it’s usually an incurable brain tumor.) That person (usually) pursues conventional therapy to the point where it can no longer offer anything other than palliation. It’s then at that point that the patient, now considered to be “terminal,” finds Burzynski (or another cancer quack) and decides to “take a chance.” If the patient does well (at least for a while), he or she becomes a believer and then proselytizes for the Holy Church of Burzynski, who then garners more followers victims. Of course, patients who don’t do so well usually die quickly and are never heard from. Moreover, most (close to all, actually) of the “success stories” of these quacks also eventually die, but when they do it’s swept under the rug, often with their stories disappearing from the pro-Burzynski websites. It’s not just cancer quacks, either. Quacks of all stripes rely on these stories, which are particularly effective in the case of serious diseases whose courses naturally wax and wane and whose temporary improvements can be attributed to whatever alternative medicine was tried at the time.

These stories are very compelling, because we human beings are story telling apes with pattern-seeking brains. It matters not whether the pattern reflects true causality; our brains impose causality on stories. That’s how the idea that vaccines cause autism developed; enough children are vaccinated in relatively close proximity to their parents noticing the first symptoms of autism that by random chance alone there are lots of kids whose first symptoms appear to coincide with vaccines that parents confuse correlation with causation. It’s also true of a lot of narratives about quackery. It’s therefore not surprising that these sorts of stories are appealing to publications that normally should know better. For instance, STAT News painted a young man’s quest to undergo treatment by Stanislaw’s Burzynski’s antineoplastons as a battle against an uncaring FDA, even though the FDA was actually trying to protect patients (and, sadly, failing) against Burzynski’s cancer quackery. Earlier this week, the New York Times did the same thing, glorifying anecdotes of patients who used alternative medicine and appear to have gotten better as though they demonstrated efficacy, in an article by Jane Brody entitled Hitting a Medical Wall, and Turning to Unproven Treatments. It’s based on a book, The Other Side of Impossible: Ordinary People Who Faced Daunting Medical Challenges and Refused to Give Up, by Susannah Meadows. You can tell the framing of the tale from the title of the book, but in case you can’t, here’s a description:

You’re faced with a difficult health condition. You have exhausted medicine’s answers. What do you do? Susannah Meadows tells the real-life stories of seven families who persisted when traditional medicine alone wasn’t enough.

Their adventures take us to the outer frontiers of medical science and cutting-edge complementary therapies, as Meadows explores research into the mind’s potential to heal the body, the possible role food may play in reversing disease, the power of agency, perseverance, and hope—and more.

And:

Meadows chronicles her own story, and takes you into the lives of other remarkable people, exploring their heartbreaks and triumphs. One boy who has severe food allergies undergoes an unconventional therapy and is soon eating everything. An organic farmer in Washington State tries to solve the puzzle of her daughter’s epileptic seizures. A physician with MS creates her own combination of treatments and goes from a wheelchair to riding a bike again. A child diagnosed with ADHD refuses to take medication and instead improves his life, and the life of his family, after changing his diet. Other families take on rheumatoid arthritis and autistic behaviors.

So you know right away that Meadows approaches her topic as a true believer, having used “a combination of traditional and complementary medicine they beat the disease [juvenile idiopathic arthritis], and the odds.” There is not an ounce of skepticism detected, and unfortunately Brody shows minimal skepticism as well:

In her new book, “The Other Side of Impossible,” Susannah Meadows, a Brooklyn-based former senior writer for Newsweek, has compiled compelling stories about people who faced and ultimately surmounted daunting medical challenges. The book focuses on several families, including her own, who felt they had no choice but to wade into the world of unproven therapies.

The families’ ventures into a realm that some would call quackery were typically inspired by love, desperation and hope, and were fueled by irrepressible grit and determination to find solutions to debilitating health problems that defied the best that conventional medicine could offer.

“Into a realm that some would call quackery”? Um, no. Much of it is quackery, with little or now biological plausibility and, even more importantly, no good clinical trial evidence that it works. So Meadows explores several cases, and, not surprisingly, she found “at least three important influences on well-being that have yet to receive their just due in understanding what might cause or aggravate certain intractable medical disorders.” If you’ve been reading this blog (or, of course, my not-so-super-secret other blog or other medical skeptic blogs), I bet you can figure out what at least one or two of these influences are. I’ll give a hint: Think “autism biomed.” Here’s another hint: I’ll mention that, surprisingly, heaving metal toxicity was not one of them; at least it wasn’t mentioned in Brody’s article. So that leaves a couple of other common bits of quackery common in “autism biomed.” Can you guess?

OK, I’ll tell you:

One is a characteristic called “leaky gut,” essentially tiny holes in the intestinal walls that allow proteins to reach the bloodstream where they can trigger a vicious immune attack on healthy tissues.

Another is an imbalance of microbes in the gut and how communication between the brain and the gut can adversely affect behavior and emotional stability. A third is the still underappreciated interaction of mind and body, especially the effect that anxiety and fear can have on the body’s response to otherwise harmless substances.

Now, “leaky gut” might be something resembling real syndrome, but the quack version of leaky gut is quite unlike what doctors understand. Think of it as being like celiac disease—only more so. Celiac disease, unlike leaky gut, is a characterized disease. There’s no doubt, either, that it’s very debilitating to about 1% of the population and can be ameliorated by avoiding gluten in the diet. However, in the hands of popular culture and quacks, “gluten sensitivity” has become the cause of all manner of symptoms, vague or not-so-vague, and is at the root of all diseases, even though “gluten sensitivity” really doesn’t exist outside of celiac disease. Like “gluten sensitivity,” leaky gut has become a catch-all diagnosis that naturopaths and other quacks love to make to explain all manner of symptoms and justify all manner of quackery. Leaky gut is a particularly popular diagnosis these days among autism quacks. Indeed, you can go all the way back to Andrew Wakefield himself and his “autistic enterocolitis” to find an early version of leaky gut being invoked as a “cause” of autism. In any case, it’s worth invoking the Canadian Society of Gastrointestinal Research when it says:

The Myth: According to the proponents of leaky gut syndrome, bacteria and toxins enter the bloodstream through these defective tight junctions and wreak havoc throughout the body, causing bloating, gas, cramps, inflammatory bowel disease (IBD), as well as fatigue, food sensitivities, joint pain, moodiness, irritability, sleeplessness, autism, and skin problems like eczema and psoriasis.

Debunked: This is all speculation, as scientific studies do not validate any of these claims. It is extremely dangerous that a TV doctor personality and some otherwise trusted practitioners are diagnosing and treating this baseless ‘syndrome’.

The same document points out how the treatments proposed for “leaky gut syndrome” range from bogus to dangerous and how the wrong diagnostic tests are frequently used.

Not surprisingly, autism quacks are fond of invoking the “intestinal microbiome.” Indeed, claiming changes in the intestinal microbiome is now a favorite quack diagnosis and treatments to restore the biome are a favorite among naturopaths. The microbiome is closer to gluten sensitivity in that there is an evolving body of evidence that the microbiome has a significant effect on health and disease. It’s not implausible that changes in the microbiome can contribute to disease. However, like epigenetics, the intestinal microbiome is a concept that’s been co-opted by quacks of many stripes to explain…well, everything. For yucks, I searched the antivaccine crank quack website Age of Autism for “microbiome” and came up with hundreds of hits. Basically, the microbiome is an important topic for which further research is more than justified, but the vast majority of claims made by those claiming to treat disease by treating the microbiome are without a grounding in evidence, particularly when changes in the microbiome are made for autism, heart disease, autoimmune diseases, diabetes, and pretty much every chronic disease under the sun. None of that stops quacks like Sayer Ji from saying things like, “99% of what it means to be human is microbiome-based.”

Basically, the microbiome and “leaky gut” are the new “quantum,” in terms of co-optation of the terms by quacks. I wonder if Deepak Chopra has discovered them yet. Oh, crap. He has. He’s even said that “we are a few human cells hanging on to a bacterial colony, we are the awakening of bacterial consciousness” and that the microbiome “doesn’t like anything that’s refined, manufactured, processed, GMO’d, because again GMO interferes with its ecology. It is the life of the earth. And when it gets inflamed, it sends out metabolites that cause disruption of the activity, both of the epigenome and of the gene directly.”

So this is what we’re dealing with here. We’re also dealing with stories like this:

That patient was Dr. Terry Wahls, who overcame a progressive form of multiple sclerosis for which medicine had little to offer.

Once confined to a reclining wheelchair despite trying a range of conventional treatments, Dr. Wahls researched, then adopted, a diet that eliminated grains, dairy and sugar but included 12 cups a day of berries and vegetables supplemented with grass-fed beef, organ meats and oily fish. She combined this with neuromuscular electrical stimulation and exercise.

Within a year, Dr. Wahls had ditched her motorized assists and started riding a bicycle. Eight years later, she shows no signs of her disease. Last summer, the National Multiple Sclerosis Society, which has been tracking research into diet and inflammation, committed more than $1 million to study the effect of her diet on M.S.-related fatigue.

Steve Novella analyzed Dr. Wahls’ anecdote three years ago. Let’s just say that it’s not as convincing as presented here, pointing out:

If you could really cure MS with diet alone, it would be easy to demonstrate this in a clinical trial. Drake and Wahls know this, so they have to also endorse (even if just implied) crazy conspiracy theories about Big Pharma, the medical system, and greedy or just pathologically incurious doctors.

Now, let’s get back to Meadows and her son Shepherd, who developed idiopathic juvenile arthritis. According to Brody:

She and her husband were told he was unlikely to outgrow it. Facing a choice of doing nothing or treating him with a potent drug that “made him feel bad and did little for his arthritis,” she learned about a child with the same condition who was helped by avoiding gluten and dairy products and taking fish oil, probiotics and a Chinese herb.

“With nothing to lose — if it helped one child, maybe it will help ours,” Ms. Meadows said. “In terms of hope, an example of one is very important.” And as she reported four years ago in an article in The New York Times Magazine, Shepherd got better.

Eventually, with the help of a self-styled healer named Amy Thieringer, who emphasizes the need to calm fear and anxiety when trying to counter food sensitivities, Shepherd was gradually reintroduced to gluten and dairy and “now eats everything without any problems, no more painful, inflamed joints,” his mother said.

Curious, I checked out Thieringer’s website. It touts something called the “Allergy Release Technique,” which she describes thusly:

Allergy Release Technique™ (A.R.T.™) is an integrative methodology that focuses on building and strengthening the body’s immune system with the goal of eliminating allergic responses. A.R.T.™ is a unique combination of advanced energy medicine and Western technology, working to balance an individual’s energy to allow the immune system to function optimally.

This is pure drivel. If you don’t believe me, then look at this further description:

Amy developed a protocol based on functional health using a Galvanic Skin Response Device. She is looking at the body’s systems as a whole, seeing which systems are stressed and figuring out what microorganisms and toxins are creating the stress. Amy has also identified five trigger allergens that habitually create stress in the body and contribute to the heightened immune response. They are mold, dust, chemicals, sugars and additives. When she uses homeopathy to balance the immune system she also makes sure these five allergens do not stress the body.

Along with balancing and strengthening the immune system, A.R.T.™ has varied tools that support the anxiety response in the body: kids tap specific Acupuncture Points to reroute the Autonomic Control System and deactivate old scripting. They use mantras, vision boards and grateful journals to create a new story. They let their “firefighters” (immune response) know that they are strong and ask them to step back so they can safely eat the foods.

Homeopathy? Regular readers know that I refer to homeopathy as “The One Quackery To Rule Them All,” and with good reason. Galvanic skin response? It’s also quackery. I also note how Thieringer touts how she is featured in Meadows’ book, and it’s true. From Brody’s account, it’s clear that Meadows touts at least one other of Thieringer’s “success stories.” It’s also clear that Brody didn’t do even minimal checking into what Thieringer actually does in her treatments.

In any case, Thieringer came later. The first person who tried to treat Shepherd through diet was Charlotte Walker, and Shepherd was getting methotrexate at the same time, leading Meadows to admit four years ago:

To be clear: There is no proof that it was Walker’s regimen that drove away Shane’s [Walker’s son’s] and Shepherd’s arthritis. Shane’s case makes a stronger argument, since he didn’t take methotrexate. Still, his arthritis may have gone into spontaneous remission, and a study of one is not much of a study at all.

It’s not clear whether Meadows had yet discovered Thieringer then, but a recent interview on Oprah.com (of course!) featured Meadows praising Thieringer to high heaven.

I agree with Steve Novella that it’s extremely disappointing how the NYT has pandered to a simplistic narrative that will benefit quacks everywhere. Unfortunately, it’s not just the NYT that failed here. Just yesterday, NPR also published a credulous interview with Meadows, where she offers encourages experimentation in a way that an autism biomed mom would approve of heartily:

The biggest thing that I have learned is that when it seems as if there are no options, you can still look for them and maybe find them. That you have a choice to keep going when others say that you can’t. I don’t think I had that feeling when Shepherd was diagnosed, but I think his unlikely recovery taught me that.

While persistence is a valuable trait that will take you far, there comes a point when persistence is harmful. That point is when persistence blinds you to pseudoscience. Meadows appears to have reached that point, and Brooks bought into the narrative. I wonder if this is the wave of the future at the NYT, given that it just hired a climate science denialist for its opinion page.



from ScienceBlogs http://ift.tt/2qssjfH

[Editor’s note: Sorry this is a few hours late. I forgot to change the status from DRAFT to SCHEDULE in WordPress. D’oh!]

The single most persuasive strategies by which quacks sell their wares and believers in quackery persuade others to try the quackery they believe in is the personal anecdote. Indeed, I established very early on in the history of this blog a type of post that has become a staple that shows up several times a year. In these posts, I deconstruct “alternative cancer cure” testimonials, showing how the story as related doesn’t provide convincing evidence that the quackery being touted is actually responsible for how well the person who used it is doing and how the patient’s good fortune is usually due to previous conventional treatment and/or being a biological outlier. (There’s a reason why I frequently cite a 50-year-old paper showing that about 18% and 4% of women with completely untreated breast cancer are still alive at 5 and 10 years, respectively.) Don’t believe me? Click this link. It goes to one of the first posts I ever wrote, which has served as a template for similar posts for over 12 years.

Cancer quacks like Stanislaw Burzynski rely on these stories, so much so that there is an entire website devoted to showing how the vast majority of these patients were exploited and died anyway. The basic narrative is this. A person develops an incurable cancer. (In the case of Burzynski, it’s usually an incurable brain tumor.) That person (usually) pursues conventional therapy to the point where it can no longer offer anything other than palliation. It’s then at that point that the patient, now considered to be “terminal,” finds Burzynski (or another cancer quack) and decides to “take a chance.” If the patient does well (at least for a while), he or she becomes a believer and then proselytizes for the Holy Church of Burzynski, who then garners more followers victims. Of course, patients who don’t do so well usually die quickly and are never heard from. Moreover, most (close to all, actually) of the “success stories” of these quacks also eventually die, but when they do it’s swept under the rug, often with their stories disappearing from the pro-Burzynski websites. It’s not just cancer quacks, either. Quacks of all stripes rely on these stories, which are particularly effective in the case of serious diseases whose courses naturally wax and wane and whose temporary improvements can be attributed to whatever alternative medicine was tried at the time.

These stories are very compelling, because we human beings are story telling apes with pattern-seeking brains. It matters not whether the pattern reflects true causality; our brains impose causality on stories. That’s how the idea that vaccines cause autism developed; enough children are vaccinated in relatively close proximity to their parents noticing the first symptoms of autism that by random chance alone there are lots of kids whose first symptoms appear to coincide with vaccines that parents confuse correlation with causation. It’s also true of a lot of narratives about quackery. It’s therefore not surprising that these sorts of stories are appealing to publications that normally should know better. For instance, STAT News painted a young man’s quest to undergo treatment by Stanislaw’s Burzynski’s antineoplastons as a battle against an uncaring FDA, even though the FDA was actually trying to protect patients (and, sadly, failing) against Burzynski’s cancer quackery. Earlier this week, the New York Times did the same thing, glorifying anecdotes of patients who used alternative medicine and appear to have gotten better as though they demonstrated efficacy, in an article by Jane Brody entitled Hitting a Medical Wall, and Turning to Unproven Treatments. It’s based on a book, The Other Side of Impossible: Ordinary People Who Faced Daunting Medical Challenges and Refused to Give Up, by Susannah Meadows. You can tell the framing of the tale from the title of the book, but in case you can’t, here’s a description:

You’re faced with a difficult health condition. You have exhausted medicine’s answers. What do you do? Susannah Meadows tells the real-life stories of seven families who persisted when traditional medicine alone wasn’t enough.

Their adventures take us to the outer frontiers of medical science and cutting-edge complementary therapies, as Meadows explores research into the mind’s potential to heal the body, the possible role food may play in reversing disease, the power of agency, perseverance, and hope—and more.

And:

Meadows chronicles her own story, and takes you into the lives of other remarkable people, exploring their heartbreaks and triumphs. One boy who has severe food allergies undergoes an unconventional therapy and is soon eating everything. An organic farmer in Washington State tries to solve the puzzle of her daughter’s epileptic seizures. A physician with MS creates her own combination of treatments and goes from a wheelchair to riding a bike again. A child diagnosed with ADHD refuses to take medication and instead improves his life, and the life of his family, after changing his diet. Other families take on rheumatoid arthritis and autistic behaviors.

So you know right away that Meadows approaches her topic as a true believer, having used “a combination of traditional and complementary medicine they beat the disease [juvenile idiopathic arthritis], and the odds.” There is not an ounce of skepticism detected, and unfortunately Brody shows minimal skepticism as well:

In her new book, “The Other Side of Impossible,” Susannah Meadows, a Brooklyn-based former senior writer for Newsweek, has compiled compelling stories about people who faced and ultimately surmounted daunting medical challenges. The book focuses on several families, including her own, who felt they had no choice but to wade into the world of unproven therapies.

The families’ ventures into a realm that some would call quackery were typically inspired by love, desperation and hope, and were fueled by irrepressible grit and determination to find solutions to debilitating health problems that defied the best that conventional medicine could offer.

“Into a realm that some would call quackery”? Um, no. Much of it is quackery, with little or now biological plausibility and, even more importantly, no good clinical trial evidence that it works. So Meadows explores several cases, and, not surprisingly, she found “at least three important influences on well-being that have yet to receive their just due in understanding what might cause or aggravate certain intractable medical disorders.” If you’ve been reading this blog (or, of course, my not-so-super-secret other blog or other medical skeptic blogs), I bet you can figure out what at least one or two of these influences are. I’ll give a hint: Think “autism biomed.” Here’s another hint: I’ll mention that, surprisingly, heaving metal toxicity was not one of them; at least it wasn’t mentioned in Brody’s article. So that leaves a couple of other common bits of quackery common in “autism biomed.” Can you guess?

OK, I’ll tell you:

One is a characteristic called “leaky gut,” essentially tiny holes in the intestinal walls that allow proteins to reach the bloodstream where they can trigger a vicious immune attack on healthy tissues.

Another is an imbalance of microbes in the gut and how communication between the brain and the gut can adversely affect behavior and emotional stability. A third is the still underappreciated interaction of mind and body, especially the effect that anxiety and fear can have on the body’s response to otherwise harmless substances.

Now, “leaky gut” might be something resembling real syndrome, but the quack version of leaky gut is quite unlike what doctors understand. Think of it as being like celiac disease—only more so. Celiac disease, unlike leaky gut, is a characterized disease. There’s no doubt, either, that it’s very debilitating to about 1% of the population and can be ameliorated by avoiding gluten in the diet. However, in the hands of popular culture and quacks, “gluten sensitivity” has become the cause of all manner of symptoms, vague or not-so-vague, and is at the root of all diseases, even though “gluten sensitivity” really doesn’t exist outside of celiac disease. Like “gluten sensitivity,” leaky gut has become a catch-all diagnosis that naturopaths and other quacks love to make to explain all manner of symptoms and justify all manner of quackery. Leaky gut is a particularly popular diagnosis these days among autism quacks. Indeed, you can go all the way back to Andrew Wakefield himself and his “autistic enterocolitis” to find an early version of leaky gut being invoked as a “cause” of autism. In any case, it’s worth invoking the Canadian Society of Gastrointestinal Research when it says:

The Myth: According to the proponents of leaky gut syndrome, bacteria and toxins enter the bloodstream through these defective tight junctions and wreak havoc throughout the body, causing bloating, gas, cramps, inflammatory bowel disease (IBD), as well as fatigue, food sensitivities, joint pain, moodiness, irritability, sleeplessness, autism, and skin problems like eczema and psoriasis.

Debunked: This is all speculation, as scientific studies do not validate any of these claims. It is extremely dangerous that a TV doctor personality and some otherwise trusted practitioners are diagnosing and treating this baseless ‘syndrome’.

The same document points out how the treatments proposed for “leaky gut syndrome” range from bogus to dangerous and how the wrong diagnostic tests are frequently used.

Not surprisingly, autism quacks are fond of invoking the “intestinal microbiome.” Indeed, claiming changes in the intestinal microbiome is now a favorite quack diagnosis and treatments to restore the biome are a favorite among naturopaths. The microbiome is closer to gluten sensitivity in that there is an evolving body of evidence that the microbiome has a significant effect on health and disease. It’s not implausible that changes in the microbiome can contribute to disease. However, like epigenetics, the intestinal microbiome is a concept that’s been co-opted by quacks of many stripes to explain…well, everything. For yucks, I searched the antivaccine crank quack website Age of Autism for “microbiome” and came up with hundreds of hits. Basically, the microbiome is an important topic for which further research is more than justified, but the vast majority of claims made by those claiming to treat disease by treating the microbiome are without a grounding in evidence, particularly when changes in the microbiome are made for autism, heart disease, autoimmune diseases, diabetes, and pretty much every chronic disease under the sun. None of that stops quacks like Sayer Ji from saying things like, “99% of what it means to be human is microbiome-based.”

Basically, the microbiome and “leaky gut” are the new “quantum,” in terms of co-optation of the terms by quacks. I wonder if Deepak Chopra has discovered them yet. Oh, crap. He has. He’s even said that “we are a few human cells hanging on to a bacterial colony, we are the awakening of bacterial consciousness” and that the microbiome “doesn’t like anything that’s refined, manufactured, processed, GMO’d, because again GMO interferes with its ecology. It is the life of the earth. And when it gets inflamed, it sends out metabolites that cause disruption of the activity, both of the epigenome and of the gene directly.”

So this is what we’re dealing with here. We’re also dealing with stories like this:

That patient was Dr. Terry Wahls, who overcame a progressive form of multiple sclerosis for which medicine had little to offer.

Once confined to a reclining wheelchair despite trying a range of conventional treatments, Dr. Wahls researched, then adopted, a diet that eliminated grains, dairy and sugar but included 12 cups a day of berries and vegetables supplemented with grass-fed beef, organ meats and oily fish. She combined this with neuromuscular electrical stimulation and exercise.

Within a year, Dr. Wahls had ditched her motorized assists and started riding a bicycle. Eight years later, she shows no signs of her disease. Last summer, the National Multiple Sclerosis Society, which has been tracking research into diet and inflammation, committed more than $1 million to study the effect of her diet on M.S.-related fatigue.

Steve Novella analyzed Dr. Wahls’ anecdote three years ago. Let’s just say that it’s not as convincing as presented here, pointing out:

If you could really cure MS with diet alone, it would be easy to demonstrate this in a clinical trial. Drake and Wahls know this, so they have to also endorse (even if just implied) crazy conspiracy theories about Big Pharma, the medical system, and greedy or just pathologically incurious doctors.

Now, let’s get back to Meadows and her son Shepherd, who developed idiopathic juvenile arthritis. According to Brody:

She and her husband were told he was unlikely to outgrow it. Facing a choice of doing nothing or treating him with a potent drug that “made him feel bad and did little for his arthritis,” she learned about a child with the same condition who was helped by avoiding gluten and dairy products and taking fish oil, probiotics and a Chinese herb.

“With nothing to lose — if it helped one child, maybe it will help ours,” Ms. Meadows said. “In terms of hope, an example of one is very important.” And as she reported four years ago in an article in The New York Times Magazine, Shepherd got better.

Eventually, with the help of a self-styled healer named Amy Thieringer, who emphasizes the need to calm fear and anxiety when trying to counter food sensitivities, Shepherd was gradually reintroduced to gluten and dairy and “now eats everything without any problems, no more painful, inflamed joints,” his mother said.

Curious, I checked out Thieringer’s website. It touts something called the “Allergy Release Technique,” which she describes thusly:

Allergy Release Technique™ (A.R.T.™) is an integrative methodology that focuses on building and strengthening the body’s immune system with the goal of eliminating allergic responses. A.R.T.™ is a unique combination of advanced energy medicine and Western technology, working to balance an individual’s energy to allow the immune system to function optimally.

This is pure drivel. If you don’t believe me, then look at this further description:

Amy developed a protocol based on functional health using a Galvanic Skin Response Device. She is looking at the body’s systems as a whole, seeing which systems are stressed and figuring out what microorganisms and toxins are creating the stress. Amy has also identified five trigger allergens that habitually create stress in the body and contribute to the heightened immune response. They are mold, dust, chemicals, sugars and additives. When she uses homeopathy to balance the immune system she also makes sure these five allergens do not stress the body.

Along with balancing and strengthening the immune system, A.R.T.™ has varied tools that support the anxiety response in the body: kids tap specific Acupuncture Points to reroute the Autonomic Control System and deactivate old scripting. They use mantras, vision boards and grateful journals to create a new story. They let their “firefighters” (immune response) know that they are strong and ask them to step back so they can safely eat the foods.

Homeopathy? Regular readers know that I refer to homeopathy as “The One Quackery To Rule Them All,” and with good reason. Galvanic skin response? It’s also quackery. I also note how Thieringer touts how she is featured in Meadows’ book, and it’s true. From Brody’s account, it’s clear that Meadows touts at least one other of Thieringer’s “success stories.” It’s also clear that Brody didn’t do even minimal checking into what Thieringer actually does in her treatments.

In any case, Thieringer came later. The first person who tried to treat Shepherd through diet was Charlotte Walker, and Shepherd was getting methotrexate at the same time, leading Meadows to admit four years ago:

To be clear: There is no proof that it was Walker’s regimen that drove away Shane’s [Walker’s son’s] and Shepherd’s arthritis. Shane’s case makes a stronger argument, since he didn’t take methotrexate. Still, his arthritis may have gone into spontaneous remission, and a study of one is not much of a study at all.

It’s not clear whether Meadows had yet discovered Thieringer then, but a recent interview on Oprah.com (of course!) featured Meadows praising Thieringer to high heaven.

I agree with Steve Novella that it’s extremely disappointing how the NYT has pandered to a simplistic narrative that will benefit quacks everywhere. Unfortunately, it’s not just the NYT that failed here. Just yesterday, NPR also published a credulous interview with Meadows, where she offers encourages experimentation in a way that an autism biomed mom would approve of heartily:

The biggest thing that I have learned is that when it seems as if there are no options, you can still look for them and maybe find them. That you have a choice to keep going when others say that you can’t. I don’t think I had that feeling when Shepherd was diagnosed, but I think his unlikely recovery taught me that.

While persistence is a valuable trait that will take you far, there comes a point when persistence is harmful. That point is when persistence blinds you to pseudoscience. Meadows appears to have reached that point, and Brooks bought into the narrative. I wonder if this is the wave of the future at the NYT, given that it just hired a climate science denialist for its opinion page.



from ScienceBlogs http://ift.tt/2qssjfH

There is sound in space, thanks to gravitational waves (Synopsis) [Starts With A Bang]

“We have never observed infinity in nature. Whenever you have infinities in a theory, that’s where the theory fails as a description of nature. And if space was born in the Big Bang, yet is infinite now, we are forced to believe that it’s instantaneously, infinitely big. It seems absurd.” -Janna Levin

You’ve likely heard that there’s no sound in space; that sound needs a medium to travel through, and in the vacuum of space, there is none. That’s true… up to a point. If you were only a few light years away from a star, stellar remnant, black hole, or even a supernova, you’d have no way to hear, feel, or otherwise directly measure the pressure waves from those objects.

Two merging black holes. Image credit: SXS, the Simulating eXtreme Spacetimes (SXS) project (http://ift.tt/10eTU31).

Two merging black holes. Image credit: SXS, the Simulating eXtreme Spacetimes (SXS) project (http://ift.tt/10eTU31).

But they emit another kind of wave that can be interpreted as sounds, if you listen correctly: gravitational waves. These waves are so powerful, that in the very first event we ever detected, the black hole-black hole merger we saw outshone, in terms of energy, all of the stars in the observable Universe combined. There really is sound in space, as long as you know how to listen for it properly.

The gravitational wave signal from the first pair of detected, merging black holes from the LIGO collaboration. Although a large amount of information can be extracted, no images or the presence/absence of an event horizon can be gleaned. Image credit: B. P. Abbott et al. (LIGO Scientific Collaboration and Virgo Collaboration).

The gravitational wave signal from the first pair of detected, merging black holes from the LIGO collaboration. Although a large amount of information can be extracted, no images or the presence/absence of an event horizon can be gleaned. Image credit: B. P. Abbott et al. (LIGO Scientific Collaboration and Virgo Collaboration).

Come learn about it, and catch a live event, live-blogged by me, this evening!



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“We have never observed infinity in nature. Whenever you have infinities in a theory, that’s where the theory fails as a description of nature. And if space was born in the Big Bang, yet is infinite now, we are forced to believe that it’s instantaneously, infinitely big. It seems absurd.” -Janna Levin

You’ve likely heard that there’s no sound in space; that sound needs a medium to travel through, and in the vacuum of space, there is none. That’s true… up to a point. If you were only a few light years away from a star, stellar remnant, black hole, or even a supernova, you’d have no way to hear, feel, or otherwise directly measure the pressure waves from those objects.

Two merging black holes. Image credit: SXS, the Simulating eXtreme Spacetimes (SXS) project (http://ift.tt/10eTU31).

Two merging black holes. Image credit: SXS, the Simulating eXtreme Spacetimes (SXS) project (http://ift.tt/10eTU31).

But they emit another kind of wave that can be interpreted as sounds, if you listen correctly: gravitational waves. These waves are so powerful, that in the very first event we ever detected, the black hole-black hole merger we saw outshone, in terms of energy, all of the stars in the observable Universe combined. There really is sound in space, as long as you know how to listen for it properly.

The gravitational wave signal from the first pair of detected, merging black holes from the LIGO collaboration. Although a large amount of information can be extracted, no images or the presence/absence of an event horizon can be gleaned. Image credit: B. P. Abbott et al. (LIGO Scientific Collaboration and Virgo Collaboration).

The gravitational wave signal from the first pair of detected, merging black holes from the LIGO collaboration. Although a large amount of information can be extracted, no images or the presence/absence of an event horizon can be gleaned. Image credit: B. P. Abbott et al. (LIGO Scientific Collaboration and Virgo Collaboration).

Come learn about it, and catch a live event, live-blogged by me, this evening!



from ScienceBlogs http://ift.tt/2qEGU4r

Comet Halley’s 2 meteor showers

Comet Halley’s position in May, 2017. The view is from the north side of the solar system. Although the planets orbit our sun in a counterclockwise direction, Comet Halley orbits clockwise. Click here for Comet Halley’s present position, or change the date to view its position in any chosen year.

Our annual fund-raiser ends May 5. EarthSky needs your help to keep going! Please donate!

Want to donate via PayPal or send a check to EarthSky? Click here.

Comet Halley, proud parent of two meteor showers, swings into the inner solar system about every 76 years. At such times, the sun’s heat causes the comet to loosen its icy grip over its mountain-sized conglomeration of ice, dust and gas. At each pass near the sun, the crumbly comet sheds a fresh trail of debris into its orbital stream. It lost about 1/1,000th of its mass during its last flyby in 1986. It’s because comets like Halley are so crumbly that we see annual meteor showers, like the Eta Aquarid meteor shower that’s going on now. Follow the links below to learn more about Comet Halley, the meteor showers it spawns, and about how astronomers calculate the velocities of meteors streaking across our sky.

Comet Halley’s 2 meteor showers

Where is Comet Halley now?

Parent bodies of other major meteor showers

How fast do meteors from Comet Halley travel?

Comet Halley on May 29, 1910 from Wikimedia Commons

Comet Halley on May 29, 1910 via Wikimedia Commons

Kuiper Airborne Observatory acquired this image of Comet Halley in April 1986, as the comet crossed in front of the Milky Way. Image via NASA.

Comet Halley’s 2 meteor showers. Because Comet Halley has circled the sun innumerable times over countless millennia, cometary fragments litter its orbit. That’s why the comet doesn’t need to be anywhere near the Earth or the sun in order to produce a meteor shower. Instead, whenever our Earth in its orbit intersects Comet Halley’s orbit, cometary bits and pieces – oftentimes no larger than grains of sand or granules of gravel – smash into Earth’s upper atmosphere, to vaporize as fiery streaks across our sky: meteors.

It so happens we intersect Comet Halley’s orbit not once, but twice each year. In early May, we see bits of this comet as the annual Eta Aquariid meteor shower.

Then some six months later, in October, Earth in its orbit again intersects the orbital path of Comet Halley. This time around, these broken-up chunks from Halley’s Comet burn up in Earth’s atmosphere as the annual Orionid meteor shower.

By the way, these small fragments are called meteoroids when in outer space, and meteors when they vaporize in the Earth’s atmosphere.

Meteors in annual showers – made from the icy debris of comets – don’t hit the ground. They vaporize high in Earth’s atmosphere. The more rocky or metallic asteroids are what sometimes hit the ground, and then they are called meteorites.

Eta Aquarid meteors appear to radiate from near a famous asterism - or noticeable star pattern - called the Water Jar in Aquarius.

Eta Aquarid meteors appear to radiate from near a famous asterism – or noticeable star pattern – called the Water Jar in Aquarius. The shower is coming up on the mornings of May 5 and 6, 2017.

Where is Comet Halley now? Often, astronomers like to give distances of solar system objects in terms of astronomical units (AU), which is the sun-Earth distance. Comet Halley lodges 0.587 AU from the sun at its closest point to sun (perihelion) and 35.3 AU at its farthest point (aphelion).

In other words, Halley’s Comet resides about 60 times farther from the sun at its closest than it does at its farthest.

It was last at perihelion in 1986, and will again return to perihelion in 2061.

At present, Comet Halley lies outside the orbit of Neptune, and not far from its aphelion point. See the image at the top of this post – for May, 2017 – via Fourmilab.

Even so, meteroids swim throughout Comet Halley’s orbital stream, so each time Earth crosses the orbit of Halley’s Comet, in May and October, these meteoroids turn into incandescent meteors once they plunge into the Earth’s upper atmosphere.

Sideways view shows that the orbit of Halley's Comet is highly inclined to the plane of the ecliptic. Green color depicts the part of orbit to the south of the ecliptic while the blue highlights the part of the orbit to the north of the ecliptic.

Sideways view shows that the orbit of Halley’s Comet is highly inclined to the plane of the ecliptic. Green color depicts the part of orbit to the south of the ecliptic (Earth-sun orbital plane) while the blue highlights the part of the orbit to the north of the ecliptic.

Of course, Comet Halley isn’t the only comet that produces a major meteor shower …

Parent bodies of other major meteor showers

Meteor Shower Parent Body Semi-major axis Orbital Period Perihelion Aphelion
Quadrantids 2003 EH1 (asteroid) 3.12 AU 5.52 years 1.19 AU 5.06 AU
Lyrids Comet Thatcher 55.68 AU 415 years 0.92 AU 110 AU
Eta Aquarids Comet 1/P Halley 17.8 AU 75.3 years 0.59 AU 35.3 AU
Delta Aquarids Comet 96P/Machholz 3.03 AU 5.28 years 0.12 AU 5.94 AU
Perseids Comet 109P/Swift-Tuttle 26.09 AU 133 years 0.96 AU 51.23 AU
Draconids Comet 21P/Giacobini–Zinner 3.52 AU 6.62 years 1.04 AU 6.01 AU
Orionids Comet 1/P Halley 17.8 AU 75.3 years 0.59 AU 35.3 AU
Taurids Comet 2P/Encke 2.22 AU 3.30 years 0.33 AU 4.11 AU
Leonids Comet 55P/Tempel-Tuttle 10.33 AU 33.22 years 0.98 AU 19.69 AU
Geminids 3200 Phaethon (asteroid) 1.27 AU 1.43 years 0.14 AU 2.40 AU

How fast do meteors from Comet Halley travel? If we can figure how fast Comet Halley travels at the Earth’s distance from the sun, we should also be able to figure out how fast these meteors fly in our sky.

Some of you may know that a solar system body, such as a planet or comet, goes faster in its orbit as it nears the sun and more slowly in its orbit as it gets farther away. Halley’s Comet swings inside the orbit of Venus at perihelion – the comet’s nearest point to the sun. At aphelion – its most distant point – Halley’s Comet goes all the way beyond the orbit of Neptune, the solar system’s outermost (known) planet.

Diagram via SurveyMonkey. We're looking down upon the north side of the solar system plane, whereby the planets revolve around the sun counterclockwise and Halley's Comet revolves around the sun clockwise.

Diagram via SurveyMonkey. We’re looking down upon the north side of the solar system plane. The planets revolve around the sun counterclockwise, and Halley’s Comet revolves around the sun clockwise.

When the meteoroids from the orbital stream of Halley’s Comet streak across the sky as Eta Aquarid or Orionid meteors, we know these meteoroids/meteors have to be one astronomical unit (Earth’s distance) from the sun. It might be tempting to assume that these meteoroids at one astronomical unit from the sun travel through space at the same speed Earth does: 108,000 kilometers or 67,000 miles per hour.

However, the velocity of these meteoroids through space does not equal that of Earth at the Earth’s distance from the sun. For that to happen, Earth and Halley’s Comet would have to orbit the sun in the same period of time. But the orbital periods of Earth and Halley’s Comet are vastly different. Earth takes one year to orbit the sun whereas Halley’s Comet takes about 76 years.

However, thanks to the great genius, Isaac Newton, we can easily compute the velocity of these meteoroids/meteors at the Earth’s distance from the sun by using Isaac Newton’s Vis-viva equation, his poetic rendition of instantaneous motion.

The answer, giving the velocity of these meteoroids through space at the Earth’s distance from the sun, is virtually at our fingertips. All we need to know is Comet Halley’s semi-major axis (mean distance from the sun) in astronomical units. Here you have it:

Comet Halley’s semi-major axis = 17.8 astronomical units.

Once we know is a comet's semi-major axis in astronomical units, we can compute its velocity at any distance from the sun with the easy-to-use Vis-viva equation. The sun resides at one of the two foci of the comet's elliptical orbit.

Once we know is a comet’s semi-major axis in astronomical units, we can compute its velocity at any distance from the sun with the easy-to-use Vis-viva equation. The sun resides at one of the two foci of the comet’s elliptical orbit.

In the easy-to-use Vis-viva equation below, r = distance from sun in astronomical units, and a = semi-major axis of Comet Halley’s orbit in astronomical units. In other words, r = 1 AU and a = 17.8 AU.

Vis-viva equation (r = distance from sun = 1 AU; and a = semi-major axis = 17.8 AU):

Velocity = 67,000 x the square root of (2/r – 1/a)
Velocity = 67,000 x the square root of (2/1 – 1/17.8)
Velocity = 67,000 x the square root of (2 – 0.056)
Velocity = 67,000 x the square root of 1.944
Velocity = 67,000 x 1.39
Velocity = 93,130 miles per hour or 25.87 miles per second

The above answer gives the velocity of these meteoroids through space at the Earth’s distance from the sun. However, if these meteoroids were to hit Earth’s atmosphere head-on, that would push the velocity up to an incredible 160,130 miles per hour (93,130 + 67,000 = 160,130). NASA gives the velocity for the Eta Aquarid meteors and Orionid meteors at 148,000 miles per hour, which suggests the collision of these meteoroids/meteors with Earth is not all that far from head-on.

We can also use the Vis-viva equation to find out the velocity of Halley’s Comet (or its meteoroids) at the perihelion distance of 0.59 AU and aphelion distance of 35.3 AU.

Perihelion velocity = 122,331 miles per hour

Aphelion velocity = 1,464 miles per hour

Comets develop gas and dust tails as they approach the sun. Depending on the comet, the comet can orbit the sun counter-clockwise (as above) or clockwise (as Comet Halley does). Read more: Why do comets develop tails?

Comets develop gas and dust tails as they approach the sun. Depending on the comet, the comet can orbit the sun counter-clockwise (as above) or clockwise (as Comet Halley does). Read more: Why do comets develop tails?

Bottom line: Halley’s Comet spawned two annual meteor showers, the Eta Aquarids in May and the Orionids in October. Plus … where the comet is now, parent bodies of other meteor showers … and Isaac Newton’s Vis-viva equation, his poetic rendition of instantaneous motion.



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Comet Halley’s position in May, 2017. The view is from the north side of the solar system. Although the planets orbit our sun in a counterclockwise direction, Comet Halley orbits clockwise. Click here for Comet Halley’s present position, or change the date to view its position in any chosen year.

Our annual fund-raiser ends May 5. EarthSky needs your help to keep going! Please donate!

Want to donate via PayPal or send a check to EarthSky? Click here.

Comet Halley, proud parent of two meteor showers, swings into the inner solar system about every 76 years. At such times, the sun’s heat causes the comet to loosen its icy grip over its mountain-sized conglomeration of ice, dust and gas. At each pass near the sun, the crumbly comet sheds a fresh trail of debris into its orbital stream. It lost about 1/1,000th of its mass during its last flyby in 1986. It’s because comets like Halley are so crumbly that we see annual meteor showers, like the Eta Aquarid meteor shower that’s going on now. Follow the links below to learn more about Comet Halley, the meteor showers it spawns, and about how astronomers calculate the velocities of meteors streaking across our sky.

Comet Halley’s 2 meteor showers

Where is Comet Halley now?

Parent bodies of other major meteor showers

How fast do meteors from Comet Halley travel?

Comet Halley on May 29, 1910 from Wikimedia Commons

Comet Halley on May 29, 1910 via Wikimedia Commons

Kuiper Airborne Observatory acquired this image of Comet Halley in April 1986, as the comet crossed in front of the Milky Way. Image via NASA.

Comet Halley’s 2 meteor showers. Because Comet Halley has circled the sun innumerable times over countless millennia, cometary fragments litter its orbit. That’s why the comet doesn’t need to be anywhere near the Earth or the sun in order to produce a meteor shower. Instead, whenever our Earth in its orbit intersects Comet Halley’s orbit, cometary bits and pieces – oftentimes no larger than grains of sand or granules of gravel – smash into Earth’s upper atmosphere, to vaporize as fiery streaks across our sky: meteors.

It so happens we intersect Comet Halley’s orbit not once, but twice each year. In early May, we see bits of this comet as the annual Eta Aquariid meteor shower.

Then some six months later, in October, Earth in its orbit again intersects the orbital path of Comet Halley. This time around, these broken-up chunks from Halley’s Comet burn up in Earth’s atmosphere as the annual Orionid meteor shower.

By the way, these small fragments are called meteoroids when in outer space, and meteors when they vaporize in the Earth’s atmosphere.

Meteors in annual showers – made from the icy debris of comets – don’t hit the ground. They vaporize high in Earth’s atmosphere. The more rocky or metallic asteroids are what sometimes hit the ground, and then they are called meteorites.

Eta Aquarid meteors appear to radiate from near a famous asterism - or noticeable star pattern - called the Water Jar in Aquarius.

Eta Aquarid meteors appear to radiate from near a famous asterism – or noticeable star pattern – called the Water Jar in Aquarius. The shower is coming up on the mornings of May 5 and 6, 2017.

Where is Comet Halley now? Often, astronomers like to give distances of solar system objects in terms of astronomical units (AU), which is the sun-Earth distance. Comet Halley lodges 0.587 AU from the sun at its closest point to sun (perihelion) and 35.3 AU at its farthest point (aphelion).

In other words, Halley’s Comet resides about 60 times farther from the sun at its closest than it does at its farthest.

It was last at perihelion in 1986, and will again return to perihelion in 2061.

At present, Comet Halley lies outside the orbit of Neptune, and not far from its aphelion point. See the image at the top of this post – for May, 2017 – via Fourmilab.

Even so, meteroids swim throughout Comet Halley’s orbital stream, so each time Earth crosses the orbit of Halley’s Comet, in May and October, these meteoroids turn into incandescent meteors once they plunge into the Earth’s upper atmosphere.

Sideways view shows that the orbit of Halley's Comet is highly inclined to the plane of the ecliptic. Green color depicts the part of orbit to the south of the ecliptic while the blue highlights the part of the orbit to the north of the ecliptic.

Sideways view shows that the orbit of Halley’s Comet is highly inclined to the plane of the ecliptic. Green color depicts the part of orbit to the south of the ecliptic (Earth-sun orbital plane) while the blue highlights the part of the orbit to the north of the ecliptic.

Of course, Comet Halley isn’t the only comet that produces a major meteor shower …

Parent bodies of other major meteor showers

Meteor Shower Parent Body Semi-major axis Orbital Period Perihelion Aphelion
Quadrantids 2003 EH1 (asteroid) 3.12 AU 5.52 years 1.19 AU 5.06 AU
Lyrids Comet Thatcher 55.68 AU 415 years 0.92 AU 110 AU
Eta Aquarids Comet 1/P Halley 17.8 AU 75.3 years 0.59 AU 35.3 AU
Delta Aquarids Comet 96P/Machholz 3.03 AU 5.28 years 0.12 AU 5.94 AU
Perseids Comet 109P/Swift-Tuttle 26.09 AU 133 years 0.96 AU 51.23 AU
Draconids Comet 21P/Giacobini–Zinner 3.52 AU 6.62 years 1.04 AU 6.01 AU
Orionids Comet 1/P Halley 17.8 AU 75.3 years 0.59 AU 35.3 AU
Taurids Comet 2P/Encke 2.22 AU 3.30 years 0.33 AU 4.11 AU
Leonids Comet 55P/Tempel-Tuttle 10.33 AU 33.22 years 0.98 AU 19.69 AU
Geminids 3200 Phaethon (asteroid) 1.27 AU 1.43 years 0.14 AU 2.40 AU

How fast do meteors from Comet Halley travel? If we can figure how fast Comet Halley travels at the Earth’s distance from the sun, we should also be able to figure out how fast these meteors fly in our sky.

Some of you may know that a solar system body, such as a planet or comet, goes faster in its orbit as it nears the sun and more slowly in its orbit as it gets farther away. Halley’s Comet swings inside the orbit of Venus at perihelion – the comet’s nearest point to the sun. At aphelion – its most distant point – Halley’s Comet goes all the way beyond the orbit of Neptune, the solar system’s outermost (known) planet.

Diagram via SurveyMonkey. We're looking down upon the north side of the solar system plane, whereby the planets revolve around the sun counterclockwise and Halley's Comet revolves around the sun clockwise.

Diagram via SurveyMonkey. We’re looking down upon the north side of the solar system plane. The planets revolve around the sun counterclockwise, and Halley’s Comet revolves around the sun clockwise.

When the meteoroids from the orbital stream of Halley’s Comet streak across the sky as Eta Aquarid or Orionid meteors, we know these meteoroids/meteors have to be one astronomical unit (Earth’s distance) from the sun. It might be tempting to assume that these meteoroids at one astronomical unit from the sun travel through space at the same speed Earth does: 108,000 kilometers or 67,000 miles per hour.

However, the velocity of these meteoroids through space does not equal that of Earth at the Earth’s distance from the sun. For that to happen, Earth and Halley’s Comet would have to orbit the sun in the same period of time. But the orbital periods of Earth and Halley’s Comet are vastly different. Earth takes one year to orbit the sun whereas Halley’s Comet takes about 76 years.

However, thanks to the great genius, Isaac Newton, we can easily compute the velocity of these meteoroids/meteors at the Earth’s distance from the sun by using Isaac Newton’s Vis-viva equation, his poetic rendition of instantaneous motion.

The answer, giving the velocity of these meteoroids through space at the Earth’s distance from the sun, is virtually at our fingertips. All we need to know is Comet Halley’s semi-major axis (mean distance from the sun) in astronomical units. Here you have it:

Comet Halley’s semi-major axis = 17.8 astronomical units.

Once we know is a comet's semi-major axis in astronomical units, we can compute its velocity at any distance from the sun with the easy-to-use Vis-viva equation. The sun resides at one of the two foci of the comet's elliptical orbit.

Once we know is a comet’s semi-major axis in astronomical units, we can compute its velocity at any distance from the sun with the easy-to-use Vis-viva equation. The sun resides at one of the two foci of the comet’s elliptical orbit.

In the easy-to-use Vis-viva equation below, r = distance from sun in astronomical units, and a = semi-major axis of Comet Halley’s orbit in astronomical units. In other words, r = 1 AU and a = 17.8 AU.

Vis-viva equation (r = distance from sun = 1 AU; and a = semi-major axis = 17.8 AU):

Velocity = 67,000 x the square root of (2/r – 1/a)
Velocity = 67,000 x the square root of (2/1 – 1/17.8)
Velocity = 67,000 x the square root of (2 – 0.056)
Velocity = 67,000 x the square root of 1.944
Velocity = 67,000 x 1.39
Velocity = 93,130 miles per hour or 25.87 miles per second

The above answer gives the velocity of these meteoroids through space at the Earth’s distance from the sun. However, if these meteoroids were to hit Earth’s atmosphere head-on, that would push the velocity up to an incredible 160,130 miles per hour (93,130 + 67,000 = 160,130). NASA gives the velocity for the Eta Aquarid meteors and Orionid meteors at 148,000 miles per hour, which suggests the collision of these meteoroids/meteors with Earth is not all that far from head-on.

We can also use the Vis-viva equation to find out the velocity of Halley’s Comet (or its meteoroids) at the perihelion distance of 0.59 AU and aphelion distance of 35.3 AU.

Perihelion velocity = 122,331 miles per hour

Aphelion velocity = 1,464 miles per hour

Comets develop gas and dust tails as they approach the sun. Depending on the comet, the comet can orbit the sun counter-clockwise (as above) or clockwise (as Comet Halley does). Read more: Why do comets develop tails?

Comets develop gas and dust tails as they approach the sun. Depending on the comet, the comet can orbit the sun counter-clockwise (as above) or clockwise (as Comet Halley does). Read more: Why do comets develop tails?

Bottom line: Halley’s Comet spawned two annual meteor showers, the Eta Aquarids in May and the Orionids in October. Plus … where the comet is now, parent bodies of other meteor showers … and Isaac Newton’s Vis-viva equation, his poetic rendition of instantaneous motion.



from EarthSky http://ift.tt/24eZU7Y

Why more Eta Aquarid meteors in Southern Hemisphere?

Eta Aquarid meteor shower in 2015 from Atacama Desert thanks to our friend Yuri Beletsky! Visit Yuri on Facebook.

Eta Aquarid meteor shower in 2015 from Chile’s Atacama Desert. Composite image by Yuri Beletsky.

The famous Eta Aquarid meteor shower – one of the year’s major meteor showers – peaks every year in early May. In 2017, the peak centers around May 6. This shower is known to be richer as seen from Earth’s Southern Hemisphere than from the Northern Hemisphere. Why?

If you traced the paths of Eta Aquarid meteors backward on the sky’s dome, you’d find that these meteors appear to stream from an asterism, or recognizable pattern of stars, known as the Water Jar in the constellation Aquarius.

This spot in the sky is the radiant point of the Eta Aquarid meteor shower. The meteors seem to emanate from the vicinity of the Water Jar, before spreading out and appearing in all parts of the sky.

The radiant point of the Eta Aquarid meteor shower is near the famous Water Jar asterism of the constellation Aquarius.

The radiant point of the Eta Aquarid meteor shower is near the famous Water Jar asterism of the constellation Aquarius.

Because the Water Jar is on the celestial equator – an imaginary great circle directly above the Earth’s equator – the radiant of the Eta Aquarid shower rises due east as seen from all over the world. Moreover, the radiant rises at about the same time worldwide, around 1:40 a.m. local time (2:40 a.m. Daylight Saving Time) in early May, around the shower’s typical peak date.

So you’d think the shower would be about the same as seen from around the globe.

But it’s not. The reason it’s not is that sunrise comes later to the Southern Hemisphere (where it’s autumn in May) and earlier to the Northern Hemisphere (where it’s spring in May).

Later sunrise means more dark time to watch meteors. And it also means the radiant point of the Eta Aquarid shower has a chance to climb higher into the predawn sky as seen from more southerly latitudes. That’s why the tropics and southern temperate latitudes tend to see more Eta Aquarid meteors than we do at mid-northern latitudes.

Cruise to a southerly latitude, anyone?

Everything you need to know: Eta Aquarid meteor shower

Eta Aquarius in 2013 by Colin Legg

Eta Aquarids in 2013 by Colin Legg in Australia.

Bottom line: Everyone around the globe can enjoy the Eta Aquarid meteor shower in early May. Best for the Southern Hemisphere! Peak in 2017 is on the mornings of May 5 and 6.

Read more: EarthSky’s annual meteor shower guide



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Eta Aquarid meteor shower in 2015 from Atacama Desert thanks to our friend Yuri Beletsky! Visit Yuri on Facebook.

Eta Aquarid meteor shower in 2015 from Chile’s Atacama Desert. Composite image by Yuri Beletsky.

The famous Eta Aquarid meteor shower – one of the year’s major meteor showers – peaks every year in early May. In 2017, the peak centers around May 6. This shower is known to be richer as seen from Earth’s Southern Hemisphere than from the Northern Hemisphere. Why?

If you traced the paths of Eta Aquarid meteors backward on the sky’s dome, you’d find that these meteors appear to stream from an asterism, or recognizable pattern of stars, known as the Water Jar in the constellation Aquarius.

This spot in the sky is the radiant point of the Eta Aquarid meteor shower. The meteors seem to emanate from the vicinity of the Water Jar, before spreading out and appearing in all parts of the sky.

The radiant point of the Eta Aquarid meteor shower is near the famous Water Jar asterism of the constellation Aquarius.

The radiant point of the Eta Aquarid meteor shower is near the famous Water Jar asterism of the constellation Aquarius.

Because the Water Jar is on the celestial equator – an imaginary great circle directly above the Earth’s equator – the radiant of the Eta Aquarid shower rises due east as seen from all over the world. Moreover, the radiant rises at about the same time worldwide, around 1:40 a.m. local time (2:40 a.m. Daylight Saving Time) in early May, around the shower’s typical peak date.

So you’d think the shower would be about the same as seen from around the globe.

But it’s not. The reason it’s not is that sunrise comes later to the Southern Hemisphere (where it’s autumn in May) and earlier to the Northern Hemisphere (where it’s spring in May).

Later sunrise means more dark time to watch meteors. And it also means the radiant point of the Eta Aquarid shower has a chance to climb higher into the predawn sky as seen from more southerly latitudes. That’s why the tropics and southern temperate latitudes tend to see more Eta Aquarid meteors than we do at mid-northern latitudes.

Cruise to a southerly latitude, anyone?

Everything you need to know: Eta Aquarid meteor shower

Eta Aquarius in 2013 by Colin Legg

Eta Aquarids in 2013 by Colin Legg in Australia.

Bottom line: Everyone around the globe can enjoy the Eta Aquarid meteor shower in early May. Best for the Southern Hemisphere! Peak in 2017 is on the mornings of May 5 and 6.

Read more: EarthSky’s annual meteor shower guide



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Video: Close-approach comets

Our annual fund-raiser ends May 5. EarthSky needs your help to keep going! Please donate!

Want to donate via PayPal or send a check to EarthSky? Click here.

In 2017 and 2018, three comets are passing near the Earth, enabling scientists to study them without launching a spacecraft. Their names are 41P/Tuttle-Giacobini-Kresak, 45P/Honda-Mrkos-Pajdusakova, and 46P/Wirtanen.

Astronomers call them 41P, 45P, and 46P, for short.

At closest approach on April 1, 41P was only 56 times farther from Earth than the moon. 45P was even closer at 31 lunar distances when it flew by on February 11.

But the comet 46P/Wirtanen might be the biggest attraction to stargazers. It’ll approach within 30 lunar distances of Earth on December 16, 2018 and might – at that time – become visible to the unaided eye from dark sky sites.

Telescopes around the world have been trained on these comets as they’ve passed by, studying their structure and chemical compositions.

Learn more in the video above, and see photos below from the EarthSky community!

This composite image shows the movement of Comet 45P/Honda-Mrkos-Pajdusakova on February 11, 2017. Photos by Chris Plonski in Charlotte, North Carolina

February 7, 2017 photo of Comet 45P/Honda-Mrkos-Pajdusakova by Brian Ottum in Animas, New Mexico.

Comet 45P/Honda-Mrkos-Pajdusakova on February 7, 2017 by Abhinav Prakash Dubey in New Delhi, India.

Dominique Dierick uploaded this image of Comet 41P/Tuttle-Giacobini-Kresak to Flickr on March 25, 2017.

Avid comet photographer Chris Schur caught Comet 41P/Tuttle-Giacobini-Kresak, too. He wrote: “Seldom does a bright comet (Mv=9) pass right through the bowl of the Big Dipper in Ursa Major.” He reported a “huge teal colored coma and sharp central condensation.”

Bottom line: New NASA ScienceCast about comets passing near Earth in 2017 and 2018.

Read more from NASA



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In 2017 and 2018, three comets are passing near the Earth, enabling scientists to study them without launching a spacecraft. Their names are 41P/Tuttle-Giacobini-Kresak, 45P/Honda-Mrkos-Pajdusakova, and 46P/Wirtanen.

Astronomers call them 41P, 45P, and 46P, for short.

At closest approach on April 1, 41P was only 56 times farther from Earth than the moon. 45P was even closer at 31 lunar distances when it flew by on February 11.

But the comet 46P/Wirtanen might be the biggest attraction to stargazers. It’ll approach within 30 lunar distances of Earth on December 16, 2018 and might – at that time – become visible to the unaided eye from dark sky sites.

Telescopes around the world have been trained on these comets as they’ve passed by, studying their structure and chemical compositions.

Learn more in the video above, and see photos below from the EarthSky community!

This composite image shows the movement of Comet 45P/Honda-Mrkos-Pajdusakova on February 11, 2017. Photos by Chris Plonski in Charlotte, North Carolina

February 7, 2017 photo of Comet 45P/Honda-Mrkos-Pajdusakova by Brian Ottum in Animas, New Mexico.

Comet 45P/Honda-Mrkos-Pajdusakova on February 7, 2017 by Abhinav Prakash Dubey in New Delhi, India.

Dominique Dierick uploaded this image of Comet 41P/Tuttle-Giacobini-Kresak to Flickr on March 25, 2017.

Avid comet photographer Chris Schur caught Comet 41P/Tuttle-Giacobini-Kresak, too. He wrote: “Seldom does a bright comet (Mv=9) pass right through the bowl of the Big Dipper in Ursa Major.” He reported a “huge teal colored coma and sharp central condensation.”

Bottom line: New NASA ScienceCast about comets passing near Earth in 2017 and 2018.

Read more from NASA



from EarthSky http://ift.tt/2p4JXS1

Big Dipper over Chile

Image via Yuri Beletsky.

Our annual fund-raiser ends May 5. EarthSky needs your help to keep going! Please donate!

Want to donate via PayPal or send a check to EarthSky? Click here.

Yuri Beletsky shared this gorgeous photo on EarthSky’s Facebook page. He wrote:

One of the most recognized asterisms in the Northern Hemisphere, the Big Dipper, looks very unusual from the South [Southern Hemisphere]. Tonight we witnessed quite an amazing view of the constellation climbing over volcanoes in the Northern Chile. But the most remarkable was its reflection in calm water of the lagoon. The weather was truly spectacular with almost zero wind which allowed us to enjoy the view in full glory.

Our Facebook friends loved it, but there were a few comments like this one, from Stuart McIntyre:

Can’t get used to you crazy Southerners and your upside down constellations!

Thanks Yuri!

Know the Big and Little Dippers

Bottom lineL Photo of the Big Dipper over Northern Chile.



from EarthSky http://ift.tt/2p7Fij9

Image via Yuri Beletsky.

Our annual fund-raiser ends May 5. EarthSky needs your help to keep going! Please donate!

Want to donate via PayPal or send a check to EarthSky? Click here.

Yuri Beletsky shared this gorgeous photo on EarthSky’s Facebook page. He wrote:

One of the most recognized asterisms in the Northern Hemisphere, the Big Dipper, looks very unusual from the South [Southern Hemisphere]. Tonight we witnessed quite an amazing view of the constellation climbing over volcanoes in the Northern Chile. But the most remarkable was its reflection in calm water of the lagoon. The weather was truly spectacular with almost zero wind which allowed us to enjoy the view in full glory.

Our Facebook friends loved it, but there were a few comments like this one, from Stuart McIntyre:

Can’t get used to you crazy Southerners and your upside down constellations!

Thanks Yuri!

Know the Big and Little Dippers

Bottom lineL Photo of the Big Dipper over Northern Chile.



from EarthSky http://ift.tt/2p7Fij9

Testing a new immunotherapy treatment for neuroblastoma

T cell

Immunotherapies are changing the outlook for many cancer patients.

Drugs that block cancer cells from deflecting an immune attack are now routinely used to treat advanced skin and kidney cancers, and are showing promise in other types of cancer too.

But cancers are complex and diverse – what works well against one type of cancer might have little effect against another. The immunotherapies available for some patients aren’t a magic bullet that will work for everyone.   

So researchers all over the world are looking into other potential treatments that unleash the immune system against cancer, and one of these approaches uses genetic engineering to modify our immune cells.

Professor John Anderson, a doctor and researcher who specialises in children’s cancers, tells us more about a Cancer Research UK clinical trial that he’s the leading doctor for.

It’s an early stage clinical trial that we’re running at Great Ormond Street Hospital and University College Hospital, testing the potential of a new type of immunotherapy to treat neuroblastoma – an aggressive type of cancer that most commonly occurs in young children.

What is the new treatment, and how does it work?

The treatment is based on genetically engineering a type of white blood cell in our immune system, called a T cell, to turn it into a cancer-killing cell.

The normal role of T cells is to protect us from infections, particularly viruses. Killer T cells can spot cells that are infected with a dangerous virus and destroy them, wiping out the infection. They can also spot cells that are damaged or faulty, and destroy them too.

Nearly all of our cells display small fragments of their contents on their surface as part of routine health checks. T cells wander through your body, using specialised scanners – called T cell receptors – to examine the fragments on cells as they pass by.

T cells are trained not to react to healthy cells. But when a cell is infected or damaged it usually causes changes to the fragments the cell displays, and these unusual fragments set off an alarm in T cells.

The immune system is very powerful so there are lots of checks and balances in place. But if T cells receive enough danger signals, they begin to multiply, attack and destroy the damaged or infected cells.

It’s the T cell attack that forms the basis of the treatment we’re testing. We’re using genetic engineering to create designer T cells that focus the T cells’ attack on the cancer cells. These engineered cells are called Chimeric Antigen Receptor T cells (CAR T cells).

The biggest challenge is finding a target to train the T cells to hunt, and there are two problems to tackle. Firstly, some cancers are very diverse, which means there are few, if any, targets that all the cancer cells share.

Secondly, the fragments on the surface of cancer cells are often very similar to those displayed by the same type of healthy cell, meaning that the T cells might attack healthy tissues as well, potentially causing side effects.

But in the case of neuroblastoma, there is a good target. Levels of a molecule called GD2 are high on most neuroblastoma cells, and it’s not found on most healthy cells. So that’s what we engineer the CAR T cells to target.

How do you genetically engineer someone’s T cells?

The process starts by taking blood from a patient – either normally from a vein, or using a machine that only takes out the white blood cells.

In specialised labs, we stimulate the patient’s T cells to start multiplying, then we use an engineered virus to smuggle new genes into the T cell. One of these genes contains the instructions for the T cells to make the targeting molecule (CAR) that recognises GD2.

We grow the modified CAR T cells for a few days in the lab, freeze them in batches, test them for cancer killing ability, then give them back to the patient through an IV drip.

Who can join the trial?

This is the first time we’ve tested this treatment in patients, so our first priority is measuring safety.

The immune system is extremely powerful, so any immunotherapy has the potential to cause serious side effects, and in the most severe cases, can be fatal.

This is a phase I trial and our goal is to find out the new therapy’s safety, and what doses we can give it to children without causing severe side effects.

Because we don’t know yet if it will be effective, we’re testing the CAR T cells in children who have run out treatment options. These are poorly children, whose neuroblastoma has come back and no longer responds to chemotherapy.

The trial will only include a small number of children at this stage. We predict in the range of 15 to 20 children.

The trial starts by simply giving the CAR T cells to the patient. If there are no bad reactions, then the next patients receive increasing doses of chemotherapy before giving them the CAR T cells. This will reduce the numbers of competing normal T cells and T cells that naturally dampen down immune reactions, giving the CAR T cells a better chance of surviving and mounting an attack on the cancer cells.

We’ll be monitoring the children very closely for side effects and to control the immune reaction if it gets out of hand.

Will this treatment be a big breakthrough for children with neuroblastoma?

We simply don’t know yet. That’s what we’re trying to determine through clinical trials.

Like any new treatment, the CAR T cells need to go through a rigorous process of testing. This first phase is to find out if they’re safe and what dose to use them at. We will also get some information on whether the CAR T cells start attacking the neuroblastoma cells, as they’re designed to do.

If all goes well, then we can take the treatment into larger clinical trials to start working out how effective it is.

CAR T cells have been showing lots of promise in clinical trials testing them in people with blood cancers, including various types of leukaemia and lymphoma, with many patients going into complete remission.

But their deployment against solid tumours in adult cancers has had mixed success.

And there are still safety concerns associated with CAR T cells. Once they have been unleashed, it’s hard to stop them, and an out of control immune reaction can cause death.

So we need to proceed with caution and make sure safety is at the top of our agenda. At the same time, the outlook for children with neuroblastoma that’s not responded to treatment rarely survive for more than 2 years and we urgently need better treatments for these children.

Could CAR T cells be part of the answer? Only time will tell.

Interviewed by Emma Smith



from Cancer Research UK – Science blog http://ift.tt/2qx2eJE
T cell

Immunotherapies are changing the outlook for many cancer patients.

Drugs that block cancer cells from deflecting an immune attack are now routinely used to treat advanced skin and kidney cancers, and are showing promise in other types of cancer too.

But cancers are complex and diverse – what works well against one type of cancer might have little effect against another. The immunotherapies available for some patients aren’t a magic bullet that will work for everyone.   

So researchers all over the world are looking into other potential treatments that unleash the immune system against cancer, and one of these approaches uses genetic engineering to modify our immune cells.

Professor John Anderson, a doctor and researcher who specialises in children’s cancers, tells us more about a Cancer Research UK clinical trial that he’s the leading doctor for.

It’s an early stage clinical trial that we’re running at Great Ormond Street Hospital and University College Hospital, testing the potential of a new type of immunotherapy to treat neuroblastoma – an aggressive type of cancer that most commonly occurs in young children.

What is the new treatment, and how does it work?

The treatment is based on genetically engineering a type of white blood cell in our immune system, called a T cell, to turn it into a cancer-killing cell.

The normal role of T cells is to protect us from infections, particularly viruses. Killer T cells can spot cells that are infected with a dangerous virus and destroy them, wiping out the infection. They can also spot cells that are damaged or faulty, and destroy them too.

Nearly all of our cells display small fragments of their contents on their surface as part of routine health checks. T cells wander through your body, using specialised scanners – called T cell receptors – to examine the fragments on cells as they pass by.

T cells are trained not to react to healthy cells. But when a cell is infected or damaged it usually causes changes to the fragments the cell displays, and these unusual fragments set off an alarm in T cells.

The immune system is very powerful so there are lots of checks and balances in place. But if T cells receive enough danger signals, they begin to multiply, attack and destroy the damaged or infected cells.

It’s the T cell attack that forms the basis of the treatment we’re testing. We’re using genetic engineering to create designer T cells that focus the T cells’ attack on the cancer cells. These engineered cells are called Chimeric Antigen Receptor T cells (CAR T cells).

The biggest challenge is finding a target to train the T cells to hunt, and there are two problems to tackle. Firstly, some cancers are very diverse, which means there are few, if any, targets that all the cancer cells share.

Secondly, the fragments on the surface of cancer cells are often very similar to those displayed by the same type of healthy cell, meaning that the T cells might attack healthy tissues as well, potentially causing side effects.

But in the case of neuroblastoma, there is a good target. Levels of a molecule called GD2 are high on most neuroblastoma cells, and it’s not found on most healthy cells. So that’s what we engineer the CAR T cells to target.

How do you genetically engineer someone’s T cells?

The process starts by taking blood from a patient – either normally from a vein, or using a machine that only takes out the white blood cells.

In specialised labs, we stimulate the patient’s T cells to start multiplying, then we use an engineered virus to smuggle new genes into the T cell. One of these genes contains the instructions for the T cells to make the targeting molecule (CAR) that recognises GD2.

We grow the modified CAR T cells for a few days in the lab, freeze them in batches, test them for cancer killing ability, then give them back to the patient through an IV drip.

Who can join the trial?

This is the first time we’ve tested this treatment in patients, so our first priority is measuring safety.

The immune system is extremely powerful, so any immunotherapy has the potential to cause serious side effects, and in the most severe cases, can be fatal.

This is a phase I trial and our goal is to find out the new therapy’s safety, and what doses we can give it to children without causing severe side effects.

Because we don’t know yet if it will be effective, we’re testing the CAR T cells in children who have run out treatment options. These are poorly children, whose neuroblastoma has come back and no longer responds to chemotherapy.

The trial will only include a small number of children at this stage. We predict in the range of 15 to 20 children.

The trial starts by simply giving the CAR T cells to the patient. If there are no bad reactions, then the next patients receive increasing doses of chemotherapy before giving them the CAR T cells. This will reduce the numbers of competing normal T cells and T cells that naturally dampen down immune reactions, giving the CAR T cells a better chance of surviving and mounting an attack on the cancer cells.

We’ll be monitoring the children very closely for side effects and to control the immune reaction if it gets out of hand.

Will this treatment be a big breakthrough for children with neuroblastoma?

We simply don’t know yet. That’s what we’re trying to determine through clinical trials.

Like any new treatment, the CAR T cells need to go through a rigorous process of testing. This first phase is to find out if they’re safe and what dose to use them at. We will also get some information on whether the CAR T cells start attacking the neuroblastoma cells, as they’re designed to do.

If all goes well, then we can take the treatment into larger clinical trials to start working out how effective it is.

CAR T cells have been showing lots of promise in clinical trials testing them in people with blood cancers, including various types of leukaemia and lymphoma, with many patients going into complete remission.

But their deployment against solid tumours in adult cancers has had mixed success.

And there are still safety concerns associated with CAR T cells. Once they have been unleashed, it’s hard to stop them, and an out of control immune reaction can cause death.

So we need to proceed with caution and make sure safety is at the top of our agenda. At the same time, the outlook for children with neuroblastoma that’s not responded to treatment rarely survive for more than 2 years and we urgently need better treatments for these children.

Could CAR T cells be part of the answer? Only time will tell.

Interviewed by Emma Smith



from Cancer Research UK – Science blog http://ift.tt/2qx2eJE

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