A mountain on Ceres

White icy mound against a black background.

This image uses enhanced-color combined images taken using blue, green, and infrared filters. Ahuna Mons’ elevation has been exaggerated by a factor of two. The width of the dome is approximately 12 miles (20 km). The Dawn spacecraft’s camera took the images in August 2016 from an altitude of 239 miles (385 km). Image via NASA/JPL-Caltech/UCLA/MPS/DLR/IDA.

Ceres is one of just five recognized dwarf planets in the solar system (Pluto is another). NASA’s Dawn spacecraft entered orbit around this rocky world on March 6, 2015, and studied its icy, cratered surface until the spacecraft ran out of fuel in October 2018.

One of the features Dawn spotted, shown here, is a mountain named Ahuna Mons. The highest mountain on Ceres, it rises to an elevation of 2.5 miles (4,000 meters) at its peak, and is marked by numerous bright streaks that run down its flanks.

Scientists have determined that these marks are actually salt deposits left behind from the formation of Ahuna Mons, when plumes of saltwater and mud rose and erupted from within Ceres, puncturing the surface and creating the mountain. While temperatures on Ceres are far colder than those on Earth, this mechanism is thought to be somewhat similar to the formation of volcanoes by magma plumes on our planet.

More recently, a study of Dawn data, published June 10, 2019 in Nature Geoscience, suggests that a briny, muddy ‘slurry’ exists below Ceres’ surface, surging upwards towards and through the crust to create Ahuna Mons. Another study, published in Nature Astronomy July 1, 2019, also indicates that the dwarf planet has a surprisingly dynamic geology.

Bottom line: Image from the Dawn spacecraft shows Ahuna Mons, the largest mountain on dwarf planet Ceres.

Via ESA



from EarthSky https://ift.tt/2yCxyfo
White icy mound against a black background.

This image uses enhanced-color combined images taken using blue, green, and infrared filters. Ahuna Mons’ elevation has been exaggerated by a factor of two. The width of the dome is approximately 12 miles (20 km). The Dawn spacecraft’s camera took the images in August 2016 from an altitude of 239 miles (385 km). Image via NASA/JPL-Caltech/UCLA/MPS/DLR/IDA.

Ceres is one of just five recognized dwarf planets in the solar system (Pluto is another). NASA’s Dawn spacecraft entered orbit around this rocky world on March 6, 2015, and studied its icy, cratered surface until the spacecraft ran out of fuel in October 2018.

One of the features Dawn spotted, shown here, is a mountain named Ahuna Mons. The highest mountain on Ceres, it rises to an elevation of 2.5 miles (4,000 meters) at its peak, and is marked by numerous bright streaks that run down its flanks.

Scientists have determined that these marks are actually salt deposits left behind from the formation of Ahuna Mons, when plumes of saltwater and mud rose and erupted from within Ceres, puncturing the surface and creating the mountain. While temperatures on Ceres are far colder than those on Earth, this mechanism is thought to be somewhat similar to the formation of volcanoes by magma plumes on our planet.

More recently, a study of Dawn data, published June 10, 2019 in Nature Geoscience, suggests that a briny, muddy ‘slurry’ exists below Ceres’ surface, surging upwards towards and through the crust to create Ahuna Mons. Another study, published in Nature Astronomy July 1, 2019, also indicates that the dwarf planet has a surprisingly dynamic geology.

Bottom line: Image from the Dawn spacecraft shows Ahuna Mons, the largest mountain on dwarf planet Ceres.

Via ESA



from EarthSky https://ift.tt/2yCxyfo

2019 SkS Weekly Climate Change & Global Warming News Roundup #31

A chronological listing of news articles posted on the Skeptical Science Facebook Page during the past week, i.e., Sun, July 28 through Sat, Aug 3, 2019

Editor's Pick

Pretend Underdogs: Inside a Climate Denier Conference at Trump Hotel

2019 Heritage Conference

Photo by Joe McCarthy

entered Trump International Hotel in Washington last Thursday with a three-person team to cover the Heartland Institute’s 13th International Conference on Climate Change. I left with two.

Despite the overwhelming scientific consensus that humans are causing climate change by burning fossil fuels, this free-market think tank, which has received large sums of fossil fuel money, continues to hawk various strains of climate change denial. And they weren’t happy that The Weather Channel had brought along George Mason University researcher John Cook, who tracks disinformation and climate change denialism professionally. About two hours into the conference, interim Heartland President and Director of Communications Jim Lakely pulled us aside. “You have two choices,” the stocky, spikey-haired man told us in a small conference room filled with empty cardboard boxes. “Either John leaves, or you all leave.”

(Cook was not on the press list, but was an official correspondent with The Weather Channel for the occasion. After the Heartland Institute failed to respond to multiple emails, Cook joined our reporting team, assuming there was no problem.)

This gesture — “He’s not welcome on principle,” Lakely said — set the tone for the next several hours, during which former NASA climate communications specialist Laura Faye Tenenbaum, sound recordist Rachel Falcone and I would listen to a cabal of policy wonks, contrarian scientists and communicators sounding a little too certain in their denial to deserve the title, “skeptics.”

(The visit to the conference was part of the reporting for a new investigative podcast series on climate denial and disinformation coming from The Weather Channel this fall.) 

Pretend Underdogs: Inside a Climate Denier Conference at Trump Hotel by Joseph McCarthy, The Weather Channel, Aug 2, 2019


Links posted on Facebook

Sun July 28, 2019

Mon July 29, 2019

Tue July 30, 2019

Wed July 31, 2019

Thu Aug 1, 2019

Fri Aug 2, 2019

Sat Aug 3, 2019



from Skeptical Science https://ift.tt/2T4cA2h
A chronological listing of news articles posted on the Skeptical Science Facebook Page during the past week, i.e., Sun, July 28 through Sat, Aug 3, 2019

Editor's Pick

Pretend Underdogs: Inside a Climate Denier Conference at Trump Hotel

2019 Heritage Conference

Photo by Joe McCarthy

entered Trump International Hotel in Washington last Thursday with a three-person team to cover the Heartland Institute’s 13th International Conference on Climate Change. I left with two.

Despite the overwhelming scientific consensus that humans are causing climate change by burning fossil fuels, this free-market think tank, which has received large sums of fossil fuel money, continues to hawk various strains of climate change denial. And they weren’t happy that The Weather Channel had brought along George Mason University researcher John Cook, who tracks disinformation and climate change denialism professionally. About two hours into the conference, interim Heartland President and Director of Communications Jim Lakely pulled us aside. “You have two choices,” the stocky, spikey-haired man told us in a small conference room filled with empty cardboard boxes. “Either John leaves, or you all leave.”

(Cook was not on the press list, but was an official correspondent with The Weather Channel for the occasion. After the Heartland Institute failed to respond to multiple emails, Cook joined our reporting team, assuming there was no problem.)

This gesture — “He’s not welcome on principle,” Lakely said — set the tone for the next several hours, during which former NASA climate communications specialist Laura Faye Tenenbaum, sound recordist Rachel Falcone and I would listen to a cabal of policy wonks, contrarian scientists and communicators sounding a little too certain in their denial to deserve the title, “skeptics.”

(The visit to the conference was part of the reporting for a new investigative podcast series on climate denial and disinformation coming from The Weather Channel this fall.) 

Pretend Underdogs: Inside a Climate Denier Conference at Trump Hotel by Joseph McCarthy, The Weather Channel, Aug 2, 2019


Links posted on Facebook

Sun July 28, 2019

Mon July 29, 2019

Tue July 30, 2019

Wed July 31, 2019

Thu Aug 1, 2019

Fri Aug 2, 2019

Sat Aug 3, 2019



from Skeptical Science https://ift.tt/2T4cA2h

Check out this cool video map of known exoplanets

Astronomers have discovered more than 4,000 exoplanets – planets orbiting other stars – so far, with a lot more waiting for confirmation. Now, NASA has published a cool new video “summary” of the findings, a time-lapse map if you will, of the locations of these distant worlds in our galaxy. The video was produced by SYSTEM Sounds (Matt Russo, Andrew Santaguida), using the NASA Exoplanet Archive. It was posted to YouTube on July 7, 2019, by NASA’s APOD Videos and it ran as an Astronomy Picture of the Day on July 10.

Even though the video is short, just over a minute long, it takes the viewer on a time-lapse, condensed journey from 1991, when no exoplanets were known, to today, with more than 4,003 known exoplanets. More than? Yes. According to the NASA Exoplanet Archive the number is now at 4,031, so the map is already outdated! The map not only shows the planets’ locations, but also color-codes them based on what method they were discovered with, whether by radial velocity, transit, imaging or microlensing. What starts as an empty background becomes a galaxy filled with planets. And those are only the ones we know about so far.

It’s hard to think back to before the early 1990s, when astronomers believed exoplanets existed, but had not found a single one in outer space. Now we know of thousands, and scientists estimate that there are billions in our galaxy alone. When you combine that with the fact that there are at least 100 billion known galaxies, the total numbers of likely exoplanets becomes mind-boggling to contemplate.

The Kepler Space Telescope alone has confirmed 2,345 exoplanets, with another 2,420 awaiting confirmation. The Kepler mission has ended, but there are still tons of data to be analyzed, and many more worlds to be confirmed. Kepler revolutionized our knowledge of exoplanets, revealing a wide variety of worlds. Many are rocky planets like Earth, while others are like mini-Neptunes, and others are gas giants like Jupiter, extremely hot because they’re orbiting so close to their stars. Smaller rocky planets and planets that are gaseous but smaller than Neptune actually appear to be the most common exoplanets, at least from what we know so far, which is encouraging for the search for life elsewhere.

TESS – Transiting Exoplanet Survey Satellite – is the newest space telescope dedicated to planet-hunting, and already has confirmed an additional 24 planets plus 993 additional candidates so far, as listed on the NASA Exoplanet Archive. One advantage that TESS has is that is observing stars that are closer to us than the ones that Kepler looked at. That means those planets will be easier targets for follow-up observations, including by upcoming space telescopes such as the James Webb Space Telescope (JWST) , which can better analyze those planets’ atmospheres. By studying the atmospheres, scientists can search for evidence of biosignatures, gases in the atmosphere that may be produced by living organisms. On Earth, that would include oxygen and methane, although there are ways those gases can be created without life as well. Certain combinations of such gases, though, would more likely have a biological origin.

Tan planet with features visible, distant sun-like star and bright dots of other planets.

Artist’s concept of Kepler-186f, the first Earth-sized exoplanet found orbiting in the habitable zone of its star. A growing number of such worlds have been found in recent years. Image via NASA Ames/JPL-Caltech/T. Pyle.

Seven roughly Earth-sized exoplanets with Earth for comparison.

Artist’s concept of seven Earth-sized worlds in the TRAPPIST-1 planetary system. TRAPPIST-1e is one of the closest rocky planets orbiting a red dwarf star that may be able to support life. Image via ESO.

Of course, beyond just finding out how many planets might be out there, people mostly want to know how many exoplanets might be habitable, or better yet, actually inhabited by some form of life. The search for biosignatures is one way to try to determine if a given planet has life. At the other end of the spectrum, a highly advanced alien civilization might make its presence known through megastructures such as Dyson spheres or other technosignatures.

We haven’t yet found any unambiguous evidence for alien life on any exoplanets, but we may be getting closer. Extrapolating from what has been discovered so far, rocky worlds like Earth are now thought to be some of the most common in our galaxy. That is an exciting development in itself. This includes some super-Earths, which are larger than Earth but smaller than Neptune. Some of those planets have been found in the habitable zones of their stars, like Earth is, where temperatures could allow liquid water on their surfaces (depending on other variable factors). Other super-Earths are thought to be true water-worlds, completely covered by oceans.

What seems certain is that this map will continue to grow in the years ahead, with thousands more exoplanets expected to be discovered by TESS and other upcoming planet-hunting missions.

Panorama of our galaxy with thousands of tiny circles in different colors.

Here’s the new “map” of known exoplanets, or planets orbiting distant suns. It’s all 4,003 known exoplanets discovered as of 2019. This image was an Astronomy Picture of the Day for July 10, 2019. Image via NASA/APOD.

Bottom line: This cool new time-lapse video map by SYSTEM Sounds (M. Russo, A. Santaguida) – using the NASA Exoplanet Archive – shows all of the exoplanets discovered so far, from 1991 to the present.

Via ZME Science

Via APOD



from EarthSky https://ift.tt/33aH4Em

Astronomers have discovered more than 4,000 exoplanets – planets orbiting other stars – so far, with a lot more waiting for confirmation. Now, NASA has published a cool new video “summary” of the findings, a time-lapse map if you will, of the locations of these distant worlds in our galaxy. The video was produced by SYSTEM Sounds (Matt Russo, Andrew Santaguida), using the NASA Exoplanet Archive. It was posted to YouTube on July 7, 2019, by NASA’s APOD Videos and it ran as an Astronomy Picture of the Day on July 10.

Even though the video is short, just over a minute long, it takes the viewer on a time-lapse, condensed journey from 1991, when no exoplanets were known, to today, with more than 4,003 known exoplanets. More than? Yes. According to the NASA Exoplanet Archive the number is now at 4,031, so the map is already outdated! The map not only shows the planets’ locations, but also color-codes them based on what method they were discovered with, whether by radial velocity, transit, imaging or microlensing. What starts as an empty background becomes a galaxy filled with planets. And those are only the ones we know about so far.

It’s hard to think back to before the early 1990s, when astronomers believed exoplanets existed, but had not found a single one in outer space. Now we know of thousands, and scientists estimate that there are billions in our galaxy alone. When you combine that with the fact that there are at least 100 billion known galaxies, the total numbers of likely exoplanets becomes mind-boggling to contemplate.

The Kepler Space Telescope alone has confirmed 2,345 exoplanets, with another 2,420 awaiting confirmation. The Kepler mission has ended, but there are still tons of data to be analyzed, and many more worlds to be confirmed. Kepler revolutionized our knowledge of exoplanets, revealing a wide variety of worlds. Many are rocky planets like Earth, while others are like mini-Neptunes, and others are gas giants like Jupiter, extremely hot because they’re orbiting so close to their stars. Smaller rocky planets and planets that are gaseous but smaller than Neptune actually appear to be the most common exoplanets, at least from what we know so far, which is encouraging for the search for life elsewhere.

TESS – Transiting Exoplanet Survey Satellite – is the newest space telescope dedicated to planet-hunting, and already has confirmed an additional 24 planets plus 993 additional candidates so far, as listed on the NASA Exoplanet Archive. One advantage that TESS has is that is observing stars that are closer to us than the ones that Kepler looked at. That means those planets will be easier targets for follow-up observations, including by upcoming space telescopes such as the James Webb Space Telescope (JWST) , which can better analyze those planets’ atmospheres. By studying the atmospheres, scientists can search for evidence of biosignatures, gases in the atmosphere that may be produced by living organisms. On Earth, that would include oxygen and methane, although there are ways those gases can be created without life as well. Certain combinations of such gases, though, would more likely have a biological origin.

Tan planet with features visible, distant sun-like star and bright dots of other planets.

Artist’s concept of Kepler-186f, the first Earth-sized exoplanet found orbiting in the habitable zone of its star. A growing number of such worlds have been found in recent years. Image via NASA Ames/JPL-Caltech/T. Pyle.

Seven roughly Earth-sized exoplanets with Earth for comparison.

Artist’s concept of seven Earth-sized worlds in the TRAPPIST-1 planetary system. TRAPPIST-1e is one of the closest rocky planets orbiting a red dwarf star that may be able to support life. Image via ESO.

Of course, beyond just finding out how many planets might be out there, people mostly want to know how many exoplanets might be habitable, or better yet, actually inhabited by some form of life. The search for biosignatures is one way to try to determine if a given planet has life. At the other end of the spectrum, a highly advanced alien civilization might make its presence known through megastructures such as Dyson spheres or other technosignatures.

We haven’t yet found any unambiguous evidence for alien life on any exoplanets, but we may be getting closer. Extrapolating from what has been discovered so far, rocky worlds like Earth are now thought to be some of the most common in our galaxy. That is an exciting development in itself. This includes some super-Earths, which are larger than Earth but smaller than Neptune. Some of those planets have been found in the habitable zones of their stars, like Earth is, where temperatures could allow liquid water on their surfaces (depending on other variable factors). Other super-Earths are thought to be true water-worlds, completely covered by oceans.

What seems certain is that this map will continue to grow in the years ahead, with thousands more exoplanets expected to be discovered by TESS and other upcoming planet-hunting missions.

Panorama of our galaxy with thousands of tiny circles in different colors.

Here’s the new “map” of known exoplanets, or planets orbiting distant suns. It’s all 4,003 known exoplanets discovered as of 2019. This image was an Astronomy Picture of the Day for July 10, 2019. Image via NASA/APOD.

Bottom line: This cool new time-lapse video map by SYSTEM Sounds (M. Russo, A. Santaguida) – using the NASA Exoplanet Archive – shows all of the exoplanets discovered so far, from 1991 to the present.

Via ZME Science

Via APOD



from EarthSky https://ift.tt/33aH4Em

Top 10 tips for watching 2019’s Perseid meteors

EarthSky friend Eliot Herman in Tucson, Arizona caught the image at the top of this post – a bright meteor, not associated with the Perseid shower, near a bright moon – in early July, 2017.

So it’s definitely possible to see and photograph bright meteors in moonlight. And that’s good news for everyone planning to watch the 2019 Perseid meteor shower. This beloved annual shower is a much-anticipated summertime treat for us in the Northern Hemisphere. In 2019, it’ll likely produce the most meteors from late evening of August 12 to dawn August 13. The moon will be in the way, however, in a waxing gibbous phase, bright in the sky on the nights around the peak and drowning many meteors in its glare. What can you do in 2019 to optimize your chances for seeing Perseid meteors? We offer these 10 tips.

1. Realize that this shower rises gradually to its peak. Few meteor showers – certainly not the Perseids – are a one-night event. The Perseid shower lasts from about July 17 to August 24 every year. That’s when our planet Earth crosses the orbital path of Comet Swift-Tuttle, the Perseid’s parent comet. What’s more, the Perseids are known to rise to their peak gradually, then fall off after the peak more rapidly. So the days leading up to the peak are a good time to watch meteors, too. You could start tonight! Expect an increasing number of meteors – and a more bothersome moon – as we get closer to 2019’s peak.

2. Be aware of the time of moonset each night. As much as possible, in the weeks between now and the peak, you’ll want to be out looking after moonset. Click here to find out when the moon sets in your sky, remembering to check the moonrise and moonset box.

3. Watch in the hours before dawn Most meteor showers are best after midnight, and the Perseids are no exception. After midnight, the part of Earth you’re standing on has turned into the meteor stream, which means the radiant point for the shower will be above your horizon. After the radiant rises, more meteors are flying … albeit, in 2019, in a increasingly moon-drenched sky. A first quarter moon sets around midnight. First quarter moon will be just four days from now, on August 7. Afterwards, the moon will be setting closer and closer to the time of dawn. The trick will be to get as close to the peak as you can, while still giving yourself a few hours with no moonlight. Use the calendar recommended above, watch moonset times carefully, and remember …

4. Avoid city lights. This should go without saying, but just a reminder. A wide open area – a field or a lonely country road – is best if you’re serious about watching meteors. Check EarthSky’s global Best Places to Stargaze map for ideas on where to go and set up.

5. Camp! Nothing beats a set-up before night begins. Of course, you’ll never see as many meteors in the evening as you will after midnight, but – if you are watching during the evening hours – you might catch an earthgrazer, which is a slow-moving and long-lasting meteor, traveling horizontally across your sky. Earthgrazers might be seen even in bright moonlight. They tend to be seen in late evening, or around midnight.

View larger. | Photo by Peter Greig in Bamburgh, England. Thank you Peter!

6. Make yourself comfortable. Sprawl out upon a reclining lawn chair, with an open view of sky. Bring along a blanket or sleeping bag. Your eyes can take as long as 20 minutes to adapt to the dark, so give yourself at least an hour of observation time.

7. Watch with friend or friends, and try facing in different directions so that if someone sees a meteor, that person can call out – “meteor!” – to the rest.

8. Notice the meteors’ speeds and colors, and watch for meteor trains. The Perseids are known to be colorful. The Perseids are also swift-moving, entering Earth’s atmosphere at about 35 miles per second (60 km per second). A meteor train is a persistent glow in the air, left by some meteors after they have faded from view. Trains are caused by luminous ionized matter left in the wake of this incoming space debris. A good percentage of Perseids are known to leave persistent trains. They linger for a moment or two after the meteor has gone.

If you trace the paths of the meteors backwards, they seem to radiate from the constellation Perseus. The radiant point of the Perseid meteor shower ascends in the northeast around midnight. Overhead-ish by dawn!

9. If you’re in the Southern Hemisphere … watch! At temperate latitudes in the Southern Hemisphere, the radiant of the Perseid meteor shower never gets very high in the sky. Therefore, the number of Perseid meteors seen from this part of the world isn’t as great as at more northerly latitudes. But if you’re game, look northward in the wee hours before dawn, and you might still see a decent display of Perseids.

10. Embrace the night. We hear people bubble with excitement about seeing meteors in all sorts of conditions – moon or no moon – city lights or no city lights. The Perseids, in particular, tend to have a lot of fireballs. And so, camp out and make a night of it! At the end of the Perseid shower, look for Orion. As dawn breaks, this bright constellation will be ascending in the east before dawn. Read more.

Looking for a dark area to observe from? Check out EarthSky’s interactive, worldwide Best Places to Stargaze map.

Becky Gillum captured this image from the Blue Ridge Parkway in North Carolina in August 2018. She wrote: “So, I’ve spent the last two nights chasing the Perseids … I’m so happy I caught 3 meteors on Saturday night/Sunday morning because Sunday night/Monday morning was a bust with the cloud cover. The Perseids over Price Lake, Julian Price Park, MP 296.7. This is a composite. The meteor on the left is as shot, the 2 meteors on the right were blended in from other shots later that night.”

Composite image showing many meteors falling in a dark sky.

Marsha Kirschbaum used 27 photos – all captured on a single night – to create the composite image, above, of 2016’s Perseid meteor shower.

Bottom line: With moonlight intruding on the 2019 Perseid shower, this is not the most favorable year for the Perseids. But it might be worth watching anyway. Top 10 tips for watching the shower here.

When is the next meteor shower? Click here for EarthSky’s meteor shower guide for 2019

EarthSky astronomy kits are perfect for beginners. Order today from the EarthSky store

Donate: Your support means the world to us



from EarthSky https://ift.tt/2LXGFQC

EarthSky friend Eliot Herman in Tucson, Arizona caught the image at the top of this post – a bright meteor, not associated with the Perseid shower, near a bright moon – in early July, 2017.

So it’s definitely possible to see and photograph bright meteors in moonlight. And that’s good news for everyone planning to watch the 2019 Perseid meteor shower. This beloved annual shower is a much-anticipated summertime treat for us in the Northern Hemisphere. In 2019, it’ll likely produce the most meteors from late evening of August 12 to dawn August 13. The moon will be in the way, however, in a waxing gibbous phase, bright in the sky on the nights around the peak and drowning many meteors in its glare. What can you do in 2019 to optimize your chances for seeing Perseid meteors? We offer these 10 tips.

1. Realize that this shower rises gradually to its peak. Few meteor showers – certainly not the Perseids – are a one-night event. The Perseid shower lasts from about July 17 to August 24 every year. That’s when our planet Earth crosses the orbital path of Comet Swift-Tuttle, the Perseid’s parent comet. What’s more, the Perseids are known to rise to their peak gradually, then fall off after the peak more rapidly. So the days leading up to the peak are a good time to watch meteors, too. You could start tonight! Expect an increasing number of meteors – and a more bothersome moon – as we get closer to 2019’s peak.

2. Be aware of the time of moonset each night. As much as possible, in the weeks between now and the peak, you’ll want to be out looking after moonset. Click here to find out when the moon sets in your sky, remembering to check the moonrise and moonset box.

3. Watch in the hours before dawn Most meteor showers are best after midnight, and the Perseids are no exception. After midnight, the part of Earth you’re standing on has turned into the meteor stream, which means the radiant point for the shower will be above your horizon. After the radiant rises, more meteors are flying … albeit, in 2019, in a increasingly moon-drenched sky. A first quarter moon sets around midnight. First quarter moon will be just four days from now, on August 7. Afterwards, the moon will be setting closer and closer to the time of dawn. The trick will be to get as close to the peak as you can, while still giving yourself a few hours with no moonlight. Use the calendar recommended above, watch moonset times carefully, and remember …

4. Avoid city lights. This should go without saying, but just a reminder. A wide open area – a field or a lonely country road – is best if you’re serious about watching meteors. Check EarthSky’s global Best Places to Stargaze map for ideas on where to go and set up.

5. Camp! Nothing beats a set-up before night begins. Of course, you’ll never see as many meteors in the evening as you will after midnight, but – if you are watching during the evening hours – you might catch an earthgrazer, which is a slow-moving and long-lasting meteor, traveling horizontally across your sky. Earthgrazers might be seen even in bright moonlight. They tend to be seen in late evening, or around midnight.

View larger. | Photo by Peter Greig in Bamburgh, England. Thank you Peter!

6. Make yourself comfortable. Sprawl out upon a reclining lawn chair, with an open view of sky. Bring along a blanket or sleeping bag. Your eyes can take as long as 20 minutes to adapt to the dark, so give yourself at least an hour of observation time.

7. Watch with friend or friends, and try facing in different directions so that if someone sees a meteor, that person can call out – “meteor!” – to the rest.

8. Notice the meteors’ speeds and colors, and watch for meteor trains. The Perseids are known to be colorful. The Perseids are also swift-moving, entering Earth’s atmosphere at about 35 miles per second (60 km per second). A meteor train is a persistent glow in the air, left by some meteors after they have faded from view. Trains are caused by luminous ionized matter left in the wake of this incoming space debris. A good percentage of Perseids are known to leave persistent trains. They linger for a moment or two after the meteor has gone.

If you trace the paths of the meteors backwards, they seem to radiate from the constellation Perseus. The radiant point of the Perseid meteor shower ascends in the northeast around midnight. Overhead-ish by dawn!

9. If you’re in the Southern Hemisphere … watch! At temperate latitudes in the Southern Hemisphere, the radiant of the Perseid meteor shower never gets very high in the sky. Therefore, the number of Perseid meteors seen from this part of the world isn’t as great as at more northerly latitudes. But if you’re game, look northward in the wee hours before dawn, and you might still see a decent display of Perseids.

10. Embrace the night. We hear people bubble with excitement about seeing meteors in all sorts of conditions – moon or no moon – city lights or no city lights. The Perseids, in particular, tend to have a lot of fireballs. And so, camp out and make a night of it! At the end of the Perseid shower, look for Orion. As dawn breaks, this bright constellation will be ascending in the east before dawn. Read more.

Looking for a dark area to observe from? Check out EarthSky’s interactive, worldwide Best Places to Stargaze map.

Becky Gillum captured this image from the Blue Ridge Parkway in North Carolina in August 2018. She wrote: “So, I’ve spent the last two nights chasing the Perseids … I’m so happy I caught 3 meteors on Saturday night/Sunday morning because Sunday night/Monday morning was a bust with the cloud cover. The Perseids over Price Lake, Julian Price Park, MP 296.7. This is a composite. The meteor on the left is as shot, the 2 meteors on the right were blended in from other shots later that night.”

Composite image showing many meteors falling in a dark sky.

Marsha Kirschbaum used 27 photos – all captured on a single night – to create the composite image, above, of 2016’s Perseid meteor shower.

Bottom line: With moonlight intruding on the 2019 Perseid shower, this is not the most favorable year for the Perseids. But it might be worth watching anyway. Top 10 tips for watching the shower here.

When is the next meteor shower? Click here for EarthSky’s meteor shower guide for 2019

EarthSky astronomy kits are perfect for beginners. Order today from the EarthSky store

Donate: Your support means the world to us



from EarthSky https://ift.tt/2LXGFQC

News digest – aspirin, breast cancer blood test, Boris Johnson’s NHS plans and bowel cancer rates in young people 

Aspirin tablets

Offer daily aspirin to people with Lynch syndrome to reduce bowel cancer risk, says NICE

Taking aspirin daily for more than 2 years could reduce bowel cancer risk in people with an inherited genetic condition, says the National Institute for Health and Care Excellence (NICE) in new draft guidance. People with Lynch syndrome have a much higher risk of developing bowel cancer than the general population and the NICE committee concluded that, in this group, the benefits were likely to outweigh the potential risks of long-term aspirin use. The Telegraph and our news report have the story.

Breast cancer blood test can detect relapse earlier than scans

A test that monitors the levels of tumour DNA circulating in the blood could help doctors to detect if someone’s breast cancer has come back before it’s visible on scans. The Independent covered the latest study results, which included 101 women with early-stage breast cancer. The researchers said the next step is to see if using the test can improve survival, by giving doctors the opportunity to alter treatment plans earlier than is possible right now.

Maintaining a healthy weight can help boost chances of surviving cancer

The link between being overweight or obese and developing cancer has been talked about a lot in recent weeks. But researchers in Sweden wanted to know if being overweight had an impact on how likely someone was to survive their cancer. They monitored over 47,000 women and found that those who had been overweight or obese were slightly less likely to survive their breast or bowel cancer than women who had maintained a healthy body mass index (BMI) throughout adulthood. Mail Online and The Times (£) has this one.

New Prime Minister promises NHS will receive the funds it was promised

In his first speech as Prime Minister, Boris Johnson said he was “committed to making sure the NHS receives the funds that were promised”. This includes money for 20 hospital upgrades as well as making sure services are ready for the winter season. According to The Guardian, Johnson has also asked for proposals to cut waiting times. The Financial Times has the full story.

NHS confederation send Boris Johnson a health and social care “to-do” list

NHS organisations wrote to the new PM this week to tell him what should be top of the list of priorities for health and social care. This includes resolving questions around long-term NHS funding and making sure that patient care doesn’t suffer as a result of Brexit. But they named NHS staff shortages as the “biggest single challenge facing the health and care sector,” saying the crisis will require bold and decisive action from the Government, NHS England and NHS Improvement.

And they weren’t the only one. Our CEO, Michelle Mitchell, wrote why building an NHS workforce for the future should be the top health priority for the new Government.

UK science “will be the loser” in a no-deal Brexit

The chair of the Wellcome Trust, the UK’s largest charitable funder of scientific research, also had some words of advice for the new Prime Minister this week. Lady Eliza Manningham-Buller said Boris Johnson needs to make sure that the UK’s immigration policy was “more welcoming” to scientists and said a no-deal Brexit was a threat to the thriving science community in the UK, as BBC News reports.

Senior doctors have also written to Johnson asking for “urgent clarification” on the Government’s plans to supply cancer treatments following a no-deal, according to BBC News.

Research centre to help scientists tackle cancer in a new way

This week we announced a £13 million virtual research centre, bringing together scientists from The Institute of Cancer Research, London and Imperial College London. The aim is to share expertise from a wide range of fields – including physics and engineering – to help “tackle research challenges from completely different angles.” Our press release and Times Higher Education (£) has the story.

Bowel cancer rates rising among younger adults in Canada

The trend, found using data from the national cancer registries in Canada, mirrors a similar increase seen in the US and the UK. Bowel cancer risk is still much lower in adults in their 20s and 30s, but figures show that the number of bowel cancer cases is on the rise in all 3 countries, as the New York Times reports. Scientists are working to explain this increase, as our blog post explains.

Scientists discover another way for cancer to hide

Cancer cells have many tricks they can use to hide from the immune system, protecting themselves from attack. And scientists in the US have discovered another ruse cancer can use to fool the immune system – putting “don’t eat me” signals on their surface. Healthy cells use these signals to stop themselves from being eaten by immune cells, but scientists also found the marker on cancer cells too.

Blocking the signal in mice with cancer helped to slow tumour growth, which is a promising first step. Researchers are now planning studies to understand who could benefit the most from the treatment, which will then need to be tested in clinical trials. The Independent has this one.

Scottish breast screening services to be reviewed

Scotland’s Public Health Minister has announced a review of the breast screening programme, saying services needed to adapt to meet the growing demand. The review is expected to last a year and will look at new technology and ways to increase the number of people taking part, reports BBC Scotland.

Stress in cervical cancer patients linked to higher risk of death

Researchers in Sweden have looked at the effect that depression, anxiety or going through a stressful life event can have on cervical cancer death in a study involving over 4,000 patients. They found that patients with stress-related conditions or those going through stressful life events were more likely to die of the disease than those who hadn’t reported stress. But what the study couldn’t unpick was why, and this type of study also can’t prove that stress directly causes earlier cancer death. ITV News has this one.

Dame Sally Davies on Desert Island Discs

Britain’s chief medical officer, due to step down at the end of this year, stopped by BBC Radio 4 to talk about her time in the role, being called ‘chief nanny’ and the importance of reducing obesity levels across the country. She said that making it easier for more people to buy healthier food was key, as the Mail Online reports.

And finally

Scientists have discovered that cutting out an amino acid primarily found in poultry, red meat and fish could slow tumour growth in mice. This led some papers to pose the question – can a vegan diet stop cancer? But as the Mail Online writes, it’s more complicated than that. And as the research only looked at diets in mice, experts concluded that it “has almost no implications for the treatment of cancer in humans.”

Katie   



from Cancer Research UK – Science blog https://ift.tt/2YjYP5q
Aspirin tablets

Offer daily aspirin to people with Lynch syndrome to reduce bowel cancer risk, says NICE

Taking aspirin daily for more than 2 years could reduce bowel cancer risk in people with an inherited genetic condition, says the National Institute for Health and Care Excellence (NICE) in new draft guidance. People with Lynch syndrome have a much higher risk of developing bowel cancer than the general population and the NICE committee concluded that, in this group, the benefits were likely to outweigh the potential risks of long-term aspirin use. The Telegraph and our news report have the story.

Breast cancer blood test can detect relapse earlier than scans

A test that monitors the levels of tumour DNA circulating in the blood could help doctors to detect if someone’s breast cancer has come back before it’s visible on scans. The Independent covered the latest study results, which included 101 women with early-stage breast cancer. The researchers said the next step is to see if using the test can improve survival, by giving doctors the opportunity to alter treatment plans earlier than is possible right now.

Maintaining a healthy weight can help boost chances of surviving cancer

The link between being overweight or obese and developing cancer has been talked about a lot in recent weeks. But researchers in Sweden wanted to know if being overweight had an impact on how likely someone was to survive their cancer. They monitored over 47,000 women and found that those who had been overweight or obese were slightly less likely to survive their breast or bowel cancer than women who had maintained a healthy body mass index (BMI) throughout adulthood. Mail Online and The Times (£) has this one.

New Prime Minister promises NHS will receive the funds it was promised

In his first speech as Prime Minister, Boris Johnson said he was “committed to making sure the NHS receives the funds that were promised”. This includes money for 20 hospital upgrades as well as making sure services are ready for the winter season. According to The Guardian, Johnson has also asked for proposals to cut waiting times. The Financial Times has the full story.

NHS confederation send Boris Johnson a health and social care “to-do” list

NHS organisations wrote to the new PM this week to tell him what should be top of the list of priorities for health and social care. This includes resolving questions around long-term NHS funding and making sure that patient care doesn’t suffer as a result of Brexit. But they named NHS staff shortages as the “biggest single challenge facing the health and care sector,” saying the crisis will require bold and decisive action from the Government, NHS England and NHS Improvement.

And they weren’t the only one. Our CEO, Michelle Mitchell, wrote why building an NHS workforce for the future should be the top health priority for the new Government.

UK science “will be the loser” in a no-deal Brexit

The chair of the Wellcome Trust, the UK’s largest charitable funder of scientific research, also had some words of advice for the new Prime Minister this week. Lady Eliza Manningham-Buller said Boris Johnson needs to make sure that the UK’s immigration policy was “more welcoming” to scientists and said a no-deal Brexit was a threat to the thriving science community in the UK, as BBC News reports.

Senior doctors have also written to Johnson asking for “urgent clarification” on the Government’s plans to supply cancer treatments following a no-deal, according to BBC News.

Research centre to help scientists tackle cancer in a new way

This week we announced a £13 million virtual research centre, bringing together scientists from The Institute of Cancer Research, London and Imperial College London. The aim is to share expertise from a wide range of fields – including physics and engineering – to help “tackle research challenges from completely different angles.” Our press release and Times Higher Education (£) has the story.

Bowel cancer rates rising among younger adults in Canada

The trend, found using data from the national cancer registries in Canada, mirrors a similar increase seen in the US and the UK. Bowel cancer risk is still much lower in adults in their 20s and 30s, but figures show that the number of bowel cancer cases is on the rise in all 3 countries, as the New York Times reports. Scientists are working to explain this increase, as our blog post explains.

Scientists discover another way for cancer to hide

Cancer cells have many tricks they can use to hide from the immune system, protecting themselves from attack. And scientists in the US have discovered another ruse cancer can use to fool the immune system – putting “don’t eat me” signals on their surface. Healthy cells use these signals to stop themselves from being eaten by immune cells, but scientists also found the marker on cancer cells too.

Blocking the signal in mice with cancer helped to slow tumour growth, which is a promising first step. Researchers are now planning studies to understand who could benefit the most from the treatment, which will then need to be tested in clinical trials. The Independent has this one.

Scottish breast screening services to be reviewed

Scotland’s Public Health Minister has announced a review of the breast screening programme, saying services needed to adapt to meet the growing demand. The review is expected to last a year and will look at new technology and ways to increase the number of people taking part, reports BBC Scotland.

Stress in cervical cancer patients linked to higher risk of death

Researchers in Sweden have looked at the effect that depression, anxiety or going through a stressful life event can have on cervical cancer death in a study involving over 4,000 patients. They found that patients with stress-related conditions or those going through stressful life events were more likely to die of the disease than those who hadn’t reported stress. But what the study couldn’t unpick was why, and this type of study also can’t prove that stress directly causes earlier cancer death. ITV News has this one.

Dame Sally Davies on Desert Island Discs

Britain’s chief medical officer, due to step down at the end of this year, stopped by BBC Radio 4 to talk about her time in the role, being called ‘chief nanny’ and the importance of reducing obesity levels across the country. She said that making it easier for more people to buy healthier food was key, as the Mail Online reports.

And finally

Scientists have discovered that cutting out an amino acid primarily found in poultry, red meat and fish could slow tumour growth in mice. This led some papers to pose the question – can a vegan diet stop cancer? But as the Mail Online writes, it’s more complicated than that. And as the research only looked at diets in mice, experts concluded that it “has almost no implications for the treatment of cancer in humans.”

Katie   



from Cancer Research UK – Science blog https://ift.tt/2YjYP5q

The 'war on coal' myth

This is a re-post from Yale Climate Connections by Karin Kirk

Is environmental extremism causing the decline of the American coal industry? A look at the economics shows that coal has been beaten fair and square in the marketplace by cheaper and cleaner alternatives. The best way to support coal communities is to confront these economic realities, rather than creating a divisive and false narrative about the reasons behind the industry’s challenges.


Talen Energy in June announced the early closure of part of its Montana Colstrip power plant, the sixth-largest source of greenhouse emissions in the U.S. Two of the plant’s four coal-burning units are to be shuttered at the end of this year. The plant, and now its closing, are emblematic of the struggle between the fight to save coal communities and the inevitable economic forces plucking away at coal’s one-time dominance of American energy.

The Colstrip plant has four units, each its own power plant. The two oldest units, Units 1 and 2, are closing in light of insurmountable headwinds. They emit so much pollution that under federal law they are not permitted to operate unless the relatively cleaner units are also running and the net pollution then can be averaged-out. These 43-year-old units are also expensive to run compared to the amount of power they generate, so they are seldom used.

Rising costs are ‘an unfortunate pas de deux, with both parties locked into a downward spiral.’

The power plant is fed by the nearby open-pit Rosebud mine, owned by Westmoreland Coal Company. Westmoreland recently emerged from Chapter 11 bankruptcy and needs to raise prices in order to keep the Rosebud mine solvent. But increasing the cost of coal tips the economic balance of the power plant still further into the red. It’s an unfortunate pas de deux, with both parties locked into a downward spiral.

This same story is repeating itself elsewhere across the U.S. in a transition that is celebrated by environmental advocates and considered a “war on coal” by President Trump and many elected Republicans. Montana’s Republican Senator, Steve Daines, echoed a familiar refrain in his press release about the Colstrip closure, claiming “yet another example of the devastating impacts of extreme environmental regulations, fringe litigation, and partisan politics.”

Divisive finger-pointing may seem a tempting response, but let’s dig a little deeper. Are environmental regulations and fringe litigation to blame for coal’s downturn? In short, the answer is no. The real answer comes down to simple economics, as illustrated here in six short points.

1. The price of coal has not increased.

If “extreme environmental regulations” were putting a burden on coal, one would expect to see coal’s price rising. But the price of coal for the electricity sector has been fairly flat. If anything, coal has gotten cheaper over the past four years.

Grach 1

The price of coal has gone down in recent years.

One might wonder if the cost of raw coal has not changed, but perhaps the price of burning it in a power plant has increased? No, not according to the levelized price of coal-powered electricity, which takes power plant operations and maintenance into account. Again, the cost of coal is stable.

Grach 2

The cost of generating coal-powered electricity is stable.

2. The price of coal has been undercut by cheaper, cleaner competitors.

The decline of coal markets has little to do with coal itself. Instead, coal has been upstaged by cheaper alternatives, which enjoy the additional benefit of being cleaner. Natural gas, utility-scale solar, and onshore wind have all dipped well below the price of coal. Such falling energy prices, improving technology, and cleaner air are improvements that would normally be celebrated, but coal industry rhetoric has turned those wins for society into “a war,” and those wins have been lost in the rhetorical shuffle.

Grach 3

The crux of the matter: Cheaper sources of energy have arrived. Many would consider that to be good news.

3. Because of these factors, the coal industry is declining in the U.S.

Since 2007, the amount of coal burned for electricity generation has fallen by a whopping 39 percent, and mine output and employment have endured similar declines. A small rebound has occurred since 2016, driven by coal-friendly policies of the Trump administration. But viewed in context of the big picture, as Associated Press has reported, “The outlook for thermal coal, the type used to fire power plants, has been bleak.”

Grach 4

All facets of the American coal industry are trending in the same direction: down.

4. Coal bankruptcies hit workers and retirees the hardest.

Since 2015, four of the six top-producing American coal companies have declared bankruptcy, with Revelation Energy the most recent addition to the list. Three have exited bankruptcy by restructuring debt. Peabody Energy emerged from bankruptcy in part by winnowing away coal miners’ retirement benefits by 88%. But those austerity measures appear not to have applied to executive benefits, and Peabody’s bankruptcy settlement included $11.9 million in cash bonuses for top executives.

Colstrip’s Westmoreland Coal Company followed a similar playbook by cutting health benefits and black lung compensation for retired miners as a way to ease $1.4 billion in debt in the company’s third round of bankruptcy. At the same time, Westmoreland issued bonuses for management.

5. Clean coal sounds great, but only exacerbates the high cost of coal.

“Clean coal” has a few different definitions. To some, it’s primarily a rhetorical refrain.

But to truly be clean and environmentally competitive, carbon emissions from coal have to be mitigated, through carbon capture and storage. Only one coal plant with carbon capture, Petra Nova in Texas, has been successfully built in the U.S. A second plant in Kemper County, Mississippi, had been under construction, but cost overruns have forced project managers to change course and the carbon capture components were never completed, despite a $7.5 billion price tag.

Given the complexity and lack of examples of “clean coal,” it’s hard to pin down its price. The U.S. Energy Information Administration estimates coal with carbon capture would cost more than twice the price of wind, solar, or gas. Another analysis, from Energy Innovation: Policy and Technology LLC, concluded that coal with carbon capture would have a price tag two to three times higher than the unsubsidized price of wind and solar.

Grach 5

The cheapest way to make clean energy is to use clean sources of energy.

But advanced math isn’t really necessary. Even “dirty” coal can’t compete on price, so adding more costs to coal only tilts the economics further away from coal’s favor. The math shows that it is far cheaper and simpler to use sources of energy that are inherently cleaner in the first place.

6. ‘Affordable Clean Energy’ rule will not save the coal industry.

The Trump administration has made numerous attempts to prop-up the coal industry. Its latest effort, the Affordable Clean Energy rule, scraps the emissions targets proposed by the Obama administration and calls for only modest emissions reductions from coal-powered electricity. The relaxed rules, certain to face court challenges, will allow more coal to be burned, but that can’t alter the fundamental economics that plague the coal industry. Case-in-point, the U.S. Energy Information Administration projects further declines in U.S. coal production in 2020 as a result of “declining coal consumption in the electric power sector and a lower forecast demand for U.S. coal exports.”

In the end, the perceived “war on coal” is primarily a consequence of better, cleaner, cheaper technology – typically the types of innovations that are encouraged rather than thwarted. Given market forces, no amount of industry favors can reverse these developments.

But the closure of mines and power plants presents acute challenges for coal communities, and experts agree that steady leadership is essential to plan ahead and ease the hardship for coal workers and their families. This is precisely why elected officials would do well to look past partisan potshots and focus on the core reasons the industry is changing. Only then can they come to grips with the economics of coal, and navigate toward long-term alternatives, which ultimately, will benefit everyone.



from Skeptical Science https://ift.tt/2ywNu2H

This is a re-post from Yale Climate Connections by Karin Kirk

Is environmental extremism causing the decline of the American coal industry? A look at the economics shows that coal has been beaten fair and square in the marketplace by cheaper and cleaner alternatives. The best way to support coal communities is to confront these economic realities, rather than creating a divisive and false narrative about the reasons behind the industry’s challenges.


Talen Energy in June announced the early closure of part of its Montana Colstrip power plant, the sixth-largest source of greenhouse emissions in the U.S. Two of the plant’s four coal-burning units are to be shuttered at the end of this year. The plant, and now its closing, are emblematic of the struggle between the fight to save coal communities and the inevitable economic forces plucking away at coal’s one-time dominance of American energy.

The Colstrip plant has four units, each its own power plant. The two oldest units, Units 1 and 2, are closing in light of insurmountable headwinds. They emit so much pollution that under federal law they are not permitted to operate unless the relatively cleaner units are also running and the net pollution then can be averaged-out. These 43-year-old units are also expensive to run compared to the amount of power they generate, so they are seldom used.

Rising costs are ‘an unfortunate pas de deux, with both parties locked into a downward spiral.’

The power plant is fed by the nearby open-pit Rosebud mine, owned by Westmoreland Coal Company. Westmoreland recently emerged from Chapter 11 bankruptcy and needs to raise prices in order to keep the Rosebud mine solvent. But increasing the cost of coal tips the economic balance of the power plant still further into the red. It’s an unfortunate pas de deux, with both parties locked into a downward spiral.

This same story is repeating itself elsewhere across the U.S. in a transition that is celebrated by environmental advocates and considered a “war on coal” by President Trump and many elected Republicans. Montana’s Republican Senator, Steve Daines, echoed a familiar refrain in his press release about the Colstrip closure, claiming “yet another example of the devastating impacts of extreme environmental regulations, fringe litigation, and partisan politics.”

Divisive finger-pointing may seem a tempting response, but let’s dig a little deeper. Are environmental regulations and fringe litigation to blame for coal’s downturn? In short, the answer is no. The real answer comes down to simple economics, as illustrated here in six short points.

1. The price of coal has not increased.

If “extreme environmental regulations” were putting a burden on coal, one would expect to see coal’s price rising. But the price of coal for the electricity sector has been fairly flat. If anything, coal has gotten cheaper over the past four years.

Grach 1

The price of coal has gone down in recent years.

One might wonder if the cost of raw coal has not changed, but perhaps the price of burning it in a power plant has increased? No, not according to the levelized price of coal-powered electricity, which takes power plant operations and maintenance into account. Again, the cost of coal is stable.

Grach 2

The cost of generating coal-powered electricity is stable.

2. The price of coal has been undercut by cheaper, cleaner competitors.

The decline of coal markets has little to do with coal itself. Instead, coal has been upstaged by cheaper alternatives, which enjoy the additional benefit of being cleaner. Natural gas, utility-scale solar, and onshore wind have all dipped well below the price of coal. Such falling energy prices, improving technology, and cleaner air are improvements that would normally be celebrated, but coal industry rhetoric has turned those wins for society into “a war,” and those wins have been lost in the rhetorical shuffle.

Grach 3

The crux of the matter: Cheaper sources of energy have arrived. Many would consider that to be good news.

3. Because of these factors, the coal industry is declining in the U.S.

Since 2007, the amount of coal burned for electricity generation has fallen by a whopping 39 percent, and mine output and employment have endured similar declines. A small rebound has occurred since 2016, driven by coal-friendly policies of the Trump administration. But viewed in context of the big picture, as Associated Press has reported, “The outlook for thermal coal, the type used to fire power plants, has been bleak.”

Grach 4

All facets of the American coal industry are trending in the same direction: down.

4. Coal bankruptcies hit workers and retirees the hardest.

Since 2015, four of the six top-producing American coal companies have declared bankruptcy, with Revelation Energy the most recent addition to the list. Three have exited bankruptcy by restructuring debt. Peabody Energy emerged from bankruptcy in part by winnowing away coal miners’ retirement benefits by 88%. But those austerity measures appear not to have applied to executive benefits, and Peabody’s bankruptcy settlement included $11.9 million in cash bonuses for top executives.

Colstrip’s Westmoreland Coal Company followed a similar playbook by cutting health benefits and black lung compensation for retired miners as a way to ease $1.4 billion in debt in the company’s third round of bankruptcy. At the same time, Westmoreland issued bonuses for management.

5. Clean coal sounds great, but only exacerbates the high cost of coal.

“Clean coal” has a few different definitions. To some, it’s primarily a rhetorical refrain.

But to truly be clean and environmentally competitive, carbon emissions from coal have to be mitigated, through carbon capture and storage. Only one coal plant with carbon capture, Petra Nova in Texas, has been successfully built in the U.S. A second plant in Kemper County, Mississippi, had been under construction, but cost overruns have forced project managers to change course and the carbon capture components were never completed, despite a $7.5 billion price tag.

Given the complexity and lack of examples of “clean coal,” it’s hard to pin down its price. The U.S. Energy Information Administration estimates coal with carbon capture would cost more than twice the price of wind, solar, or gas. Another analysis, from Energy Innovation: Policy and Technology LLC, concluded that coal with carbon capture would have a price tag two to three times higher than the unsubsidized price of wind and solar.

Grach 5

The cheapest way to make clean energy is to use clean sources of energy.

But advanced math isn’t really necessary. Even “dirty” coal can’t compete on price, so adding more costs to coal only tilts the economics further away from coal’s favor. The math shows that it is far cheaper and simpler to use sources of energy that are inherently cleaner in the first place.

6. ‘Affordable Clean Energy’ rule will not save the coal industry.

The Trump administration has made numerous attempts to prop-up the coal industry. Its latest effort, the Affordable Clean Energy rule, scraps the emissions targets proposed by the Obama administration and calls for only modest emissions reductions from coal-powered electricity. The relaxed rules, certain to face court challenges, will allow more coal to be burned, but that can’t alter the fundamental economics that plague the coal industry. Case-in-point, the U.S. Energy Information Administration projects further declines in U.S. coal production in 2020 as a result of “declining coal consumption in the electric power sector and a lower forecast demand for U.S. coal exports.”

In the end, the perceived “war on coal” is primarily a consequence of better, cleaner, cheaper technology – typically the types of innovations that are encouraged rather than thwarted. Given market forces, no amount of industry favors can reverse these developments.

But the closure of mines and power plants presents acute challenges for coal communities, and experts agree that steady leadership is essential to plan ahead and ease the hardship for coal workers and their families. This is precisely why elected officials would do well to look past partisan potshots and focus on the core reasons the industry is changing. Only then can they come to grips with the economics of coal, and navigate toward long-term alternatives, which ultimately, will benefit everyone.



from Skeptical Science https://ift.tt/2ywNu2H

What role will climate change play in the 2020 presidential election?

This is a re-post from Yale Climate Connections

Journalists and political wonks have spilled lots of ink, and more recently lots of gigabytes, in presidential election runups speculating that the environment and global warming could become significant issues in voters’ minds. Seldom have their expectations been realized.

Are there reasons to think things might turn out differently in the 2020 presidential elections? Again, we’re hearing the familiar drumbeat – this time will be different.

Supporting that view is an early July Washington Post-ABC News poll that asked Americans whether they approve or disapprove of the Trump administration’s handling of nine important issues – the economy, immigration, taxes, health care, gun violence, foreign policy, abortion, climate change, and what the poll called issues of “special concern to women.”

Climate change received the most critical response, with 62% of Americans disapproving of the administration’s actions compared to just 29% approving.

Commentary

That approval rate of “the way Trump is handling” climate change matches the 62 percent of Americans worried about the issue in a recent Yale-George Mason survey.*

The Trump administration has done nothing to address the carbon pollution causing the problem, and instead has exacerbated it. The administration began its campaign against Obama-era climate initiatives by announcing, soon after taking office, its intention to withdraw from the Paris climate agreement. Since then, the administration has moved to scrub mentions of climate change from government science press releases, has blocked climate-related congressional testimony from its intelligence agencies, has repealed the EPA Clean Power Planfrozen vehicle fuel efficiency standards, and undone dozens more regulations aimed at curbing pollutants.

Trump campaign staffers are reportedly concerned that the administration’s anti-environment agenda could hurt his re-election prospects among key constituencies, especially considering his “persistent unpopularity among female and suburban voters.” Compounding those concerns may be that the president’s approval rating hasn’t reached 50 percent during his time in office, making him the only president in the modern era never to have reached that milestone. Add in the “blue wave” midterm elections of 2018 in which Democrats regained a majority in the House of Representatives, and consider also Trump campaigners’ concerns over a mid-June Fox News poll that showed Trump trailing top Democratic presidential contenders.

An important reminder, one that the political pundits on cable TV often emphasize: It’s early in the campaign, and polling and survey results taken this far ahead of an election are certain to fluctuate. Take them with a large grain of salt at this point, many urge.

Are the political times really ‘a changin’?

That said, some Republican confidants and allies of the president – even including Trump-basher-turned-vocal-supporter Senator Lindsey Graham of South Carolina – have voiced frustration with the administration’s climate science denial. Graham was reported in E&E News as saying, “We owe it to the country to have an alternative to the Green New Deal. We’re going to sit down with the president and see if we can unveil a bill for 2020 that would be good for the environment and good for business.” Some elected Republican lawmakers have taken first steps toward developing climate policy plans of their own.

In what some analysts see as an attempt at damage control, the administration in early July appeared to shelve its controversial efforts to “review” and challenge mainstream federal climate science and analytical reports in a “red team/blue team” debate exercise.

On July 8, Trump delivered his first speech as president focusing on what he said were his administration’s environmental accomplishments. Press reports and fact-checkers noted it was full of misleading assertions and barely touched on climate change. The only relevant references were in a claim that American energy-related carbon emissions have declined rapidly since 2000 (a long-term trend that the current administration’s regulatory rollbacks cannot take credit for), a severely flawed estimate of the costs of some liberal House Democrats’ favored Green New Deal, and selective and inaccurate remarks about the Paris climate accord.

GOP: ‘No time like present’ for environmental concerns?

Against that backdrop, the conservative National Review magazine made famous by its founder William F. Buckley, Jr., on July 15 carried an article headlined “Republicans Take an Important Step Back into the Environmental Debate.”

Reporting that voters have “become increasingly worried about the environment,” the magazine, often highly critical of President Trump, reported that congressional Republicans “have finally realized that there is no time like the present to show some concern for the fate of the natural world.” It pointed to a newly established “Roosevelt Conservation Caucus,” named in honor of President Teddy Roosevelt, “founded in part to remind the public that the GOP is not as monolithically unconcerned with environmental causes as is commonly suggested.”

The National Review article reported Senator Graham saying in a press conference, “I would encourage the president to look long and hard at the science and find the solution. I’m tired of playing defense on the environment.” Graham also said that when over 90 percent of scientists are in agreement that CO2 is the principal cause of warming, “I believe the nine out of the 10, not the one.”

… but partisan political split persists

None of this changes the political calculus, however, that most voters self-identifying as Republicans side with Trump in considering climate change unworthy of their interest or attention. That contrasts with Democratic voters, who regularly single out climate change as a critical issue for their presidential candidates to address.

The roughly two dozen Democratic presidential candidates by and large have voiced support for a debate devoted exclusively to climate change and climate policy. The Democratic National Committee has remained reluctant to hold single-topic debates, but outside groups are planning a presidential candidate climate forum on September 23rd.

Several Democrats seeking the presidency have introduced their own policy proposals, some of them quite elaborate, to address climate change. In addition, a group of Democratic lawmakers have joined with candidate Bernie Sanders of Vermont in backing a resolution officially declaring a climate crisis emergency. Such symbolic resolutions often are seen as being “toothless” – the lowest of low bars compared to actual legislation – but nevertheless express the sentiment of the supporting lawmakers.

As climate change continues to increase the frequency of extreme weather events like the mid-July multi-state record-breaking heat wave that plagued much of the U.S., the issue will inevitably grow more prominent and attract more media and candidate attention in coming elections. American voters will likely become increasingly concerned, and climate policy solutions will continue to rise among their priorities. At that point, both major political parties increasingly see the writing on the wall, and candidates from both sides of the aisle will come to compete for the voting public’s favor on climate change. The heat is rising.



from Skeptical Science https://ift.tt/2ZBMnLf

This is a re-post from Yale Climate Connections

Journalists and political wonks have spilled lots of ink, and more recently lots of gigabytes, in presidential election runups speculating that the environment and global warming could become significant issues in voters’ minds. Seldom have their expectations been realized.

Are there reasons to think things might turn out differently in the 2020 presidential elections? Again, we’re hearing the familiar drumbeat – this time will be different.

Supporting that view is an early July Washington Post-ABC News poll that asked Americans whether they approve or disapprove of the Trump administration’s handling of nine important issues – the economy, immigration, taxes, health care, gun violence, foreign policy, abortion, climate change, and what the poll called issues of “special concern to women.”

Climate change received the most critical response, with 62% of Americans disapproving of the administration’s actions compared to just 29% approving.

Commentary

That approval rate of “the way Trump is handling” climate change matches the 62 percent of Americans worried about the issue in a recent Yale-George Mason survey.*

The Trump administration has done nothing to address the carbon pollution causing the problem, and instead has exacerbated it. The administration began its campaign against Obama-era climate initiatives by announcing, soon after taking office, its intention to withdraw from the Paris climate agreement. Since then, the administration has moved to scrub mentions of climate change from government science press releases, has blocked climate-related congressional testimony from its intelligence agencies, has repealed the EPA Clean Power Planfrozen vehicle fuel efficiency standards, and undone dozens more regulations aimed at curbing pollutants.

Trump campaign staffers are reportedly concerned that the administration’s anti-environment agenda could hurt his re-election prospects among key constituencies, especially considering his “persistent unpopularity among female and suburban voters.” Compounding those concerns may be that the president’s approval rating hasn’t reached 50 percent during his time in office, making him the only president in the modern era never to have reached that milestone. Add in the “blue wave” midterm elections of 2018 in which Democrats regained a majority in the House of Representatives, and consider also Trump campaigners’ concerns over a mid-June Fox News poll that showed Trump trailing top Democratic presidential contenders.

An important reminder, one that the political pundits on cable TV often emphasize: It’s early in the campaign, and polling and survey results taken this far ahead of an election are certain to fluctuate. Take them with a large grain of salt at this point, many urge.

Are the political times really ‘a changin’?

That said, some Republican confidants and allies of the president – even including Trump-basher-turned-vocal-supporter Senator Lindsey Graham of South Carolina – have voiced frustration with the administration’s climate science denial. Graham was reported in E&E News as saying, “We owe it to the country to have an alternative to the Green New Deal. We’re going to sit down with the president and see if we can unveil a bill for 2020 that would be good for the environment and good for business.” Some elected Republican lawmakers have taken first steps toward developing climate policy plans of their own.

In what some analysts see as an attempt at damage control, the administration in early July appeared to shelve its controversial efforts to “review” and challenge mainstream federal climate science and analytical reports in a “red team/blue team” debate exercise.

On July 8, Trump delivered his first speech as president focusing on what he said were his administration’s environmental accomplishments. Press reports and fact-checkers noted it was full of misleading assertions and barely touched on climate change. The only relevant references were in a claim that American energy-related carbon emissions have declined rapidly since 2000 (a long-term trend that the current administration’s regulatory rollbacks cannot take credit for), a severely flawed estimate of the costs of some liberal House Democrats’ favored Green New Deal, and selective and inaccurate remarks about the Paris climate accord.

GOP: ‘No time like present’ for environmental concerns?

Against that backdrop, the conservative National Review magazine made famous by its founder William F. Buckley, Jr., on July 15 carried an article headlined “Republicans Take an Important Step Back into the Environmental Debate.”

Reporting that voters have “become increasingly worried about the environment,” the magazine, often highly critical of President Trump, reported that congressional Republicans “have finally realized that there is no time like the present to show some concern for the fate of the natural world.” It pointed to a newly established “Roosevelt Conservation Caucus,” named in honor of President Teddy Roosevelt, “founded in part to remind the public that the GOP is not as monolithically unconcerned with environmental causes as is commonly suggested.”

The National Review article reported Senator Graham saying in a press conference, “I would encourage the president to look long and hard at the science and find the solution. I’m tired of playing defense on the environment.” Graham also said that when over 90 percent of scientists are in agreement that CO2 is the principal cause of warming, “I believe the nine out of the 10, not the one.”

… but partisan political split persists

None of this changes the political calculus, however, that most voters self-identifying as Republicans side with Trump in considering climate change unworthy of their interest or attention. That contrasts with Democratic voters, who regularly single out climate change as a critical issue for their presidential candidates to address.

The roughly two dozen Democratic presidential candidates by and large have voiced support for a debate devoted exclusively to climate change and climate policy. The Democratic National Committee has remained reluctant to hold single-topic debates, but outside groups are planning a presidential candidate climate forum on September 23rd.

Several Democrats seeking the presidency have introduced their own policy proposals, some of them quite elaborate, to address climate change. In addition, a group of Democratic lawmakers have joined with candidate Bernie Sanders of Vermont in backing a resolution officially declaring a climate crisis emergency. Such symbolic resolutions often are seen as being “toothless” – the lowest of low bars compared to actual legislation – but nevertheless express the sentiment of the supporting lawmakers.

As climate change continues to increase the frequency of extreme weather events like the mid-July multi-state record-breaking heat wave that plagued much of the U.S., the issue will inevitably grow more prominent and attract more media and candidate attention in coming elections. American voters will likely become increasingly concerned, and climate policy solutions will continue to rise among their priorities. At that point, both major political parties increasingly see the writing on the wall, and candidates from both sides of the aisle will come to compete for the voting public’s favor on climate change. The heat is rising.



from Skeptical Science https://ift.tt/2ZBMnLf