Major winter storm set to impact large swath of the U.S.

A major winter storm is set to impact a large swath of the U.S. This is NOAA’s Winter Storm Severity Index, issued January 22, 2026, and good through Sunday, January 25, 2026. A large portion of the U.S. will see various forms of severe winter weather, from dangerous cold to snow and ice. Image via NOAA/ NWS.

Major winter storm set to impact large swath of the U.S.

A winter storm is set to bring major impacts for a large region of the United States. Areas from Texas across the deep south and up into the Mid-Atlantic should be on alert. Heavy snow and devastating ice accumulations are forecast in these areas starting Friday night into early Monday morning.

More than 8 inches (20 cm) of snow is expected to accumulate from Oklahoma through Arkansas, Missouri, Illinois, Kentucky, Tennessee and into the Virginias. South of that heavy snow, significant ice will accumulate due to freezing rain. More than a half inch of ice (1.25 cm) could accumulate from eastern Texas to western North Carolina. And up to 1 inch of ice (2.5 cm) is forecast to accumulate for northern Mississippi and northwestern Alabama. This would be catastrophic levels of accumulating ice.

The National Weather Service says:

… significant and damaging ice accumulations are likely, with the potential for long-duration power outages, extensive tree damage, and extremely dangerous or impassable travel conditions. Dangerous ice and sleet impacts shift east into parts of the Southeast, Tennessee Valley and Mid-Atlantic this weekend.

In addition to the winter storm, dangerous cold is moving south across the United States, with wind chills falling as low as -50 degrees Fahrenheit (-45 C) for the northern Plains, and below-zero wind chills as far south as the southern Plains.

EarthSky’s 2026 lunar calendar is available now. Get yours today! Makes a great gift.

The storm set-up

A long-track low-pressure storm system is moving from the Rockies across the deep south. It will create the chance for winter weather as an Arctic high pressure slides south, helping to set the stage for this major winter storm.

This storm system originated in the Pacific Ocean, bringing with it plenty of Pacific moisture. As it moves near the Gulf, that moisture will impact the system, fueling precipitation. With Arctic air in place, any precipitation that falls will be frozen in some capacity, whether snow, sleet or freezing rain.

This low is going to track east, then move over the Appalachians. At the same time, another area of low pressure is going to develop off the southeastern United States, influencing wintry precipitation for the Mid-Atlantic and up toward the northeast. This is a set-up that will bring major impacts across the south and much of the eastern United States, including power outages, major disruptions in travel as well as ripple effects.

A major winter storm is moving across the United States, bringing significant snow and ice. Image via Pexels.

The different types of wintry precipitation

We often hear names of different kinds of wintry precipitation thrown around when the weather is cold or when a winter storm arrives. But they bring very different impacts and form in different ways. And what an area gets is all due to temperature profiles of the atmosphere from the ground up into the sky.

Snow is the simplest to explain and understand. It’s the precipitation that forms when the air is below freezing at the surface as well as high into the atmosphere.

Sleet is made of little ice pellets that form when liquid rain falls down through a relatively cold layer that reaches the ground. The liquid freezes, but not into the crystalized snowflakes we see with snow.

Freezing rain is liquid rain that falls through a warm layer of atmosphere until it reaches the surface. When that water hits frigid surfaces, it freezes, coating everything in a layer of ice.

How the different kinds of wintry precipitation form. Image via NOAA.

Freezing rain dangers

While all precipitation can be dangerous, freezing rain in particular – and the ice that accumulates – can be particularly devastating. This is especially true for the power grid.

When ice accumulates to 0.25 inches (0.635 cm), it can cause slick roads and sidewalks. This makes travel dangerous and causes tree branches and power lines to sag. Thus, it can cause isolated power issues and outages. Any more ice than that, and widespread outages become possible and even likely. A half inch of ice (1.27 cm) can add more than 281 pounds (127 kilos) of weight to a power line that is only 1 inch thick! It can also cause the power line to sag up to nearly 12 inches (30 cm). This can all cause power outages that can last for hours or even days, in the worst cases.

How to stay warm during the major winter storm

If you lose power after a winter storm, do what you can to stay warm safely. Stay inside and bundle up, close doors to any rooms not in use and block the cracks under the doors with towels or blankets.

If you are fortunate enough to have a generator, never run it inside your home or garage. This poses a risk of carbon monoxide poisoning. Make sure the generator is at least 20 feet away from your home, including any windows. Also, never run your car in the garage without first opening the door, even just for a moment.

When it is safe to do so, check on your family, friends and neighbors and make sure they are okay. If you go days without power and it is no longer safe for you to stay in your home, contact friends, family or your community to find where you can stay until power is restored.

It is also important to prepare before a winter storm strikes. Make sure you have days worth of non-perishable food and water for you and every member in your family (including pets!). And make sure you can prepare that food without a power source. Gas up your vehicles, and if you need fuel for any generators, do that ahead of time as well. Make sure all devices, powerbanks and portable chargers are fully charged, and get fresh batteries for lamps and flashlights.

What to do during a power outage after a winter storm. Image via NOAA.

Bottom line: A major winter storm is set to impact millions across the United States. Heavy snow and significant ice is possible, starting Friday night and through the weekend. Power outages and travel disruptions are likely for many in the path.

The post Major winter storm set to impact large swath of the U.S. first appeared on EarthSky.

from EarthSky https://ift.tt/ObUfHK0

A major winter storm is set to impact a large swath of the U.S. This is NOAA’s Winter Storm Severity Index, issued January 22, 2026, and good through Sunday, January 25, 2026. A large portion of the U.S. will see various forms of severe winter weather, from dangerous cold to snow and ice. Image via NOAA/ NWS.

Major winter storm set to impact large swath of the U.S.

A winter storm is set to bring major impacts for a large region of the United States. Areas from Texas across the deep south and up into the Mid-Atlantic should be on alert. Heavy snow and devastating ice accumulations are forecast in these areas starting Friday night into early Monday morning.

More than 8 inches (20 cm) of snow is expected to accumulate from Oklahoma through Arkansas, Missouri, Illinois, Kentucky, Tennessee and into the Virginias. South of that heavy snow, significant ice will accumulate due to freezing rain. More than a half inch of ice (1.25 cm) could accumulate from eastern Texas to western North Carolina. And up to 1 inch of ice (2.5 cm) is forecast to accumulate for northern Mississippi and northwestern Alabama. This would be catastrophic levels of accumulating ice.

The National Weather Service says:

… significant and damaging ice accumulations are likely, with the potential for long-duration power outages, extensive tree damage, and extremely dangerous or impassable travel conditions. Dangerous ice and sleet impacts shift east into parts of the Southeast, Tennessee Valley and Mid-Atlantic this weekend.

In addition to the winter storm, dangerous cold is moving south across the United States, with wind chills falling as low as -50 degrees Fahrenheit (-45 C) for the northern Plains, and below-zero wind chills as far south as the southern Plains.

EarthSky’s 2026 lunar calendar is available now. Get yours today! Makes a great gift.

The storm set-up

A long-track low-pressure storm system is moving from the Rockies across the deep south. It will create the chance for winter weather as an Arctic high pressure slides south, helping to set the stage for this major winter storm.

This storm system originated in the Pacific Ocean, bringing with it plenty of Pacific moisture. As it moves near the Gulf, that moisture will impact the system, fueling precipitation. With Arctic air in place, any precipitation that falls will be frozen in some capacity, whether snow, sleet or freezing rain.

This low is going to track east, then move over the Appalachians. At the same time, another area of low pressure is going to develop off the southeastern United States, influencing wintry precipitation for the Mid-Atlantic and up toward the northeast. This is a set-up that will bring major impacts across the south and much of the eastern United States, including power outages, major disruptions in travel as well as ripple effects.

A major winter storm is moving across the United States, bringing significant snow and ice. Image via Pexels.

The different types of wintry precipitation

We often hear names of different kinds of wintry precipitation thrown around when the weather is cold or when a winter storm arrives. But they bring very different impacts and form in different ways. And what an area gets is all due to temperature profiles of the atmosphere from the ground up into the sky.

Snow is the simplest to explain and understand. It’s the precipitation that forms when the air is below freezing at the surface as well as high into the atmosphere.

Sleet is made of little ice pellets that form when liquid rain falls down through a relatively cold layer that reaches the ground. The liquid freezes, but not into the crystalized snowflakes we see with snow.

Freezing rain is liquid rain that falls through a warm layer of atmosphere until it reaches the surface. When that water hits frigid surfaces, it freezes, coating everything in a layer of ice.

How the different kinds of wintry precipitation form. Image via NOAA.

Freezing rain dangers

While all precipitation can be dangerous, freezing rain in particular – and the ice that accumulates – can be particularly devastating. This is especially true for the power grid.

When ice accumulates to 0.25 inches (0.635 cm), it can cause slick roads and sidewalks. This makes travel dangerous and causes tree branches and power lines to sag. Thus, it can cause isolated power issues and outages. Any more ice than that, and widespread outages become possible and even likely. A half inch of ice (1.27 cm) can add more than 281 pounds (127 kilos) of weight to a power line that is only 1 inch thick! It can also cause the power line to sag up to nearly 12 inches (30 cm). This can all cause power outages that can last for hours or even days, in the worst cases.

How to stay warm during the major winter storm

If you lose power after a winter storm, do what you can to stay warm safely. Stay inside and bundle up, close doors to any rooms not in use and block the cracks under the doors with towels or blankets.

If you are fortunate enough to have a generator, never run it inside your home or garage. This poses a risk of carbon monoxide poisoning. Make sure the generator is at least 20 feet away from your home, including any windows. Also, never run your car in the garage without first opening the door, even just for a moment.

When it is safe to do so, check on your family, friends and neighbors and make sure they are okay. If you go days without power and it is no longer safe for you to stay in your home, contact friends, family or your community to find where you can stay until power is restored.

It is also important to prepare before a winter storm strikes. Make sure you have days worth of non-perishable food and water for you and every member in your family (including pets!). And make sure you can prepare that food without a power source. Gas up your vehicles, and if you need fuel for any generators, do that ahead of time as well. Make sure all devices, powerbanks and portable chargers are fully charged, and get fresh batteries for lamps and flashlights.

What to do during a power outage after a winter storm. Image via NOAA.

Bottom line: A major winter storm is set to impact millions across the United States. Heavy snow and significant ice is possible, starting Friday night and through the weekend. Power outages and travel disruptions are likely for many in the path.

The post Major winter storm set to impact large swath of the U.S. first appeared on EarthSky.

from EarthSky https://ift.tt/ObUfHK0

Which Milky Way spiral arm contains our sun?

EarthSky’s 2026 lunar calendar is available now. Get yours today! Makes a great gift.

Our sun belongs to the Orion Arm

Our Milky Way galaxy is the island of stars we call home. If you imagine it as a disk with spiral arms emanating from the center, our sun is approximately halfway from the center to the visible edge.

Plus, our solar system lies between two prominent spiral arms: the Perseus Arm and the Scutum-Centaurus Arm.

But we aren’t free floating in empty space, however. That’s because we lie on the edge of a relatively minor spiral arm, the Orion-Cygnus Arm, or simply, the Orion Arm or Local Arm. The Orion Arm of the Milky Way is probably some 3,500 light-years wide. A 2016 study suggests it’s more than 20,000 light-years long.

This Hubble Space Telescope image shows the galaxy UGC 12158. It’s a barred spiral galaxy that scientists think bears a close resemblance to the Milky Way. Image via NASA/ ESA.

The structure of the Milky Way

The Milky Way is what’s called a barred spiral galaxy. That means it has a central bar. However, there’s still a lot we don’t know about the structure of our galaxy. But studies indicate the Milky Way is about 100,000 light-years across, about 2,000 light-years deep, and has 100 to 400 billion stars.

Previously, astronomers thought that our spiral galaxy had four major arms. But now, they say it has just two major arms and many minor arms.

So where, within this vast spiral structure, do our sun and its planets reside? We’re about 26,000 light-years from the center of the galaxy, on the inner edge of the Orion-Cygnus Arm.

View larger. | Artist’s concept of our Milky Way galaxy. Astronomers now believe the Milky Way galaxy has 2 major arms and many minor arms. Our sun is about halfway from the galactic center, on a minor arm that’s sometimes called the Orion Spur. Image via NASA.

How our local spiral arm got its name

The Orion Arm gets its name from the constellation Orion the Hunter, which is one of the most prominent constellations of the Northern Hemisphere winter (Southern Hemisphere summer). Indeed, some of the brightest stars and most famous celestial objects of this constellation (Betelgeuse, Rigel, the stars of Orion’s Belt, the Orion nebula) are neighbors to our sun. The reason we see so many bright objects within the constellation Orion is because when we look at it, we’re looking into our own local spiral arm.

View larger. | Artist’s concept of our galactic neighborhood. Some of the best-known astronomical objects in our sky lie in the Orion Arm, along with our sun. Image via NASA/ R. Hurt/ Wikimedia Commons.

A habitable zone in the Milky Way galaxy?

In Michael Carroll’s book Planet Earth, Past and Present: Parallels Between Our World and its Celestial Neighbors, he explains why our position in the galaxy might be important to life on Earth. He writes:

Our location in the galaxy is significant, as it appears that – like planetary systems – galaxies have habitable zones.

An astonishing 95% of the Milky Way’s suns may not be able to sustain habitable planets, because many orbit the galaxy in paths that carry them through the deadly spiral arms. Any star that passes through one of these starry swarms is subject to deadly radiation from the congested stars. Our own solar system orbits far enough from the center to keep it in sync with the rotation of the rest of the galaxy, so that it remains in the quieter space between the spiral arms. The Earth and its planetary siblings are well placed in a quiet, resource-rich niche of a vast and complex galaxy.

Flying into Orion’s Belt at 0.001c ?
The hunter isn’t flat. It’s a real 3D region of space. (Upgraded animation!) #astronomy ?

[image or embed]

— Tony Dunn (@tony873004.bsky.social) January 6, 2026 at 7:45 AM

Bottom line: Where do we live in the Milky Way galaxy? We lie between the major arms in a smaller spiral arm known as the Orion Arm.

The post Which Milky Way spiral arm contains our sun? first appeared on EarthSky.

from EarthSky https://ift.tt/aMpmhGA

EarthSky’s 2026 lunar calendar is available now. Get yours today! Makes a great gift.

Our sun belongs to the Orion Arm

Our Milky Way galaxy is the island of stars we call home. If you imagine it as a disk with spiral arms emanating from the center, our sun is approximately halfway from the center to the visible edge.

Plus, our solar system lies between two prominent spiral arms: the Perseus Arm and the Scutum-Centaurus Arm.

But we aren’t free floating in empty space, however. That’s because we lie on the edge of a relatively minor spiral arm, the Orion-Cygnus Arm, or simply, the Orion Arm or Local Arm. The Orion Arm of the Milky Way is probably some 3,500 light-years wide. A 2016 study suggests it’s more than 20,000 light-years long.

This Hubble Space Telescope image shows the galaxy UGC 12158. It’s a barred spiral galaxy that scientists think bears a close resemblance to the Milky Way. Image via NASA/ ESA.

The structure of the Milky Way

The Milky Way is what’s called a barred spiral galaxy. That means it has a central bar. However, there’s still a lot we don’t know about the structure of our galaxy. But studies indicate the Milky Way is about 100,000 light-years across, about 2,000 light-years deep, and has 100 to 400 billion stars.

Previously, astronomers thought that our spiral galaxy had four major arms. But now, they say it has just two major arms and many minor arms.

So where, within this vast spiral structure, do our sun and its planets reside? We’re about 26,000 light-years from the center of the galaxy, on the inner edge of the Orion-Cygnus Arm.

View larger. | Artist’s concept of our Milky Way galaxy. Astronomers now believe the Milky Way galaxy has 2 major arms and many minor arms. Our sun is about halfway from the galactic center, on a minor arm that’s sometimes called the Orion Spur. Image via NASA.

How our local spiral arm got its name

The Orion Arm gets its name from the constellation Orion the Hunter, which is one of the most prominent constellations of the Northern Hemisphere winter (Southern Hemisphere summer). Indeed, some of the brightest stars and most famous celestial objects of this constellation (Betelgeuse, Rigel, the stars of Orion’s Belt, the Orion nebula) are neighbors to our sun. The reason we see so many bright objects within the constellation Orion is because when we look at it, we’re looking into our own local spiral arm.

View larger. | Artist’s concept of our galactic neighborhood. Some of the best-known astronomical objects in our sky lie in the Orion Arm, along with our sun. Image via NASA/ R. Hurt/ Wikimedia Commons.

A habitable zone in the Milky Way galaxy?

In Michael Carroll’s book Planet Earth, Past and Present: Parallels Between Our World and its Celestial Neighbors, he explains why our position in the galaxy might be important to life on Earth. He writes:

Our location in the galaxy is significant, as it appears that – like planetary systems – galaxies have habitable zones.

An astonishing 95% of the Milky Way’s suns may not be able to sustain habitable planets, because many orbit the galaxy in paths that carry them through the deadly spiral arms. Any star that passes through one of these starry swarms is subject to deadly radiation from the congested stars. Our own solar system orbits far enough from the center to keep it in sync with the rotation of the rest of the galaxy, so that it remains in the quieter space between the spiral arms. The Earth and its planetary siblings are well placed in a quiet, resource-rich niche of a vast and complex galaxy.

Flying into Orion’s Belt at 0.001c ?
The hunter isn’t flat. It’s a real 3D region of space. (Upgraded animation!) #astronomy ?

[image or embed]

— Tony Dunn (@tony873004.bsky.social) January 6, 2026 at 7:45 AM

Bottom line: Where do we live in the Milky Way galaxy? We lie between the major arms in a smaller spiral arm known as the Orion Arm.

The post Which Milky Way spiral arm contains our sun? first appeared on EarthSky.

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Powerful magnetic fields on super-Earths could boost chances of life

View larger. | This is an artist’s concept of a super-Earth with a deep magma ocean generating a magnetic field. Could powerful magnetic fields on super-Earths help these worlds be habitable for life? Image via University of Rochester Laboratory for Laser Energetics/ Michael Franchot/ University of Rochester.

• Super-Earths are rocky exoplanets larger than Earth but smaller than Neptune. Could they support life?
• Super-Earths could have powerful magnetic fields stronger than Earth’s magnetic field. Magma oceans beneath their surfaces could generate them.
• These magnetic fields could help shield the surface – and possible life – from their stars’ intense radiation, just as Earth’s magnetic field protects us.

EarthSky’s 2026 lunar calendar is available now. Get yours today! Makes a great gift.

Powerful magnetic fields on super-Earths?

Super-Earths – or rocky exoplanets between Earth and Neptune in size – might be more friendly to life than scientists thought. On January 15, 2026, researchers at the University of Rochester in New York said super-Earths might have powerful magnetic fields that help protect the surface – and any potential life – from deadly radiation from their stars.

On Earth, our protective magnetic field is generated by movement in the liquid iron outer core. But on super-Earths, the scientists said deep oceans of hot magma could produce the magnetic fields. If a super-Earth were habitable, then its magnetic field would shield any life present from the star’s radiation, just as happens on Earth.

The research team published its intriguing peer-reviewed findings in Nature Astronomy on January 15, 2026.

Molten rock layers deep within super-Earths may generate strong magnetic fields, potentially shielding these exoplanets from harmful cosmic radiation and enhancing their habitability. doi.org/hbj5pg

— Science X / Phys.org (@sciencex.bsky.social) 2026-01-15T15:49:51-05:00

Magma oceans and strong magnetic fields on super-Earths

Scientists have said super-Earths might not have the same kind of liquid iron outer core as Earth does. So could they still have magnetic fields?

The new study suggests they could, through a slightly different mechanism than what happens on Earth. These large rocky worlds could have a subsurface ocean of hot magma called a basal magma ocean. This magma could produce magnetic fields even stronger than Earth’s. As lead author Miki Nakajima at the University of Rochester explained:

A strong magnetic field is very important for life on a planet, but most of the terrestrial planets in the solar system, such as Venus and Mars, do not have them because their cores don’t have the right physical conditions to generate a magnetic field. However, super-Earths can produce dynamos in their core and/or magma, which can increase their planetary habitability.

Artist’s concept of L 98-59 d, a super-Earth world 35 light-years away. Image via NASA.

Simulating super-Earth magnetic fields

To find out if super-Earths could have magnetic fields, the researchers needed to simulate conditions inside them. Super-Earths are larger than Earth, and so they have immense pressures inside them. That means they could have long-lasting basal magma oceans and, therefore, magnetic fields.

To test that hypothesis, the researchers studied molten rock under similar conditions to what would happen in a basal magma ocean inside a super-Earth. They conducted laser shock experiments at the University of Rochester’s Laboratory for Laser Energetics. They then combined the data with quantum mechanical simulations and planetary evolution models.

The result? They found that the molten rock became electrically conductive. In fact, the magma was able to produce a powerful magnetic field stronger than Earth’s. In addition, the magnetic field could last for billions of years. That’s good news in terms of potential habitability. Nakajima said:

This work was exciting and challenging, given that my background is primarily computational and this was my first experimental work. I’m very grateful for the support from my collaborators from various research fields to conduct this interdisciplinary work. I cannot wait for future magnetic field observations of exoplanets to test our hypothesis.

Miki Nakajima at Rochester University in New York led the new study about super-Earths and their magnetic fields. Image via University of Rochester.

Potentially habitable super-Earths

There’s still a lot we don’t know about super-Earths. This includes whether they can truly be habitable. They are rocky like Earth, but bigger and more massive. How would that affect conditions on the surface?

But a powerful magnetic field would be hugely beneficial. Just as Earth’s magnetic field helps protect life on the surface by blocking deadly radiation from the sun, the same could apply to super-Earths.

Super-Earths are surprisingly common

Super-Earths are some of the most common exoplanets that astronomers have found so far. That was a bit surprising to astronomers, because our own solar system doesn’t have one. But that makes them all the more intriguing.

How many are there in our galaxy? How do they form? Can they support life? These are all questions that scientists are seeking the answers to. And if any of them are indeed confirmed to have magnetic fields, that will make them even more enticing in the search for life elsewhere.

Bottom line: A new study said powerful magnetic fields on super-Earths could help shield them from radiation from their stars, making them potentially more friendly to life.

Source: Electrical conductivities of (Mg,Fe)O at extreme pressures and implications for planetary magma oceans

Via University of Rochester

Read more: Super-Earth 18 light-years away sparks hope for life in space

Read more: Eyeball ocean world? Webb reveals an intriguing super-Earth

The post Powerful magnetic fields on super-Earths could boost chances of life first appeared on EarthSky.

from EarthSky https://ift.tt/FdgMSol

View larger. | This is an artist’s concept of a super-Earth with a deep magma ocean generating a magnetic field. Could powerful magnetic fields on super-Earths help these worlds be habitable for life? Image via University of Rochester Laboratory for Laser Energetics/ Michael Franchot/ University of Rochester.

• Super-Earths are rocky exoplanets larger than Earth but smaller than Neptune. Could they support life?
• Super-Earths could have powerful magnetic fields stronger than Earth’s magnetic field. Magma oceans beneath their surfaces could generate them.
• These magnetic fields could help shield the surface – and possible life – from their stars’ intense radiation, just as Earth’s magnetic field protects us.

EarthSky’s 2026 lunar calendar is available now. Get yours today! Makes a great gift.

Powerful magnetic fields on super-Earths?

Super-Earths – or rocky exoplanets between Earth and Neptune in size – might be more friendly to life than scientists thought. On January 15, 2026, researchers at the University of Rochester in New York said super-Earths might have powerful magnetic fields that help protect the surface – and any potential life – from deadly radiation from their stars.

On Earth, our protective magnetic field is generated by movement in the liquid iron outer core. But on super-Earths, the scientists said deep oceans of hot magma could produce the magnetic fields. If a super-Earth were habitable, then its magnetic field would shield any life present from the star’s radiation, just as happens on Earth.

The research team published its intriguing peer-reviewed findings in Nature Astronomy on January 15, 2026.

Molten rock layers deep within super-Earths may generate strong magnetic fields, potentially shielding these exoplanets from harmful cosmic radiation and enhancing their habitability. doi.org/hbj5pg

— Science X / Phys.org (@sciencex.bsky.social) 2026-01-15T15:49:51-05:00

Magma oceans and strong magnetic fields on super-Earths

Scientists have said super-Earths might not have the same kind of liquid iron outer core as Earth does. So could they still have magnetic fields?

The new study suggests they could, through a slightly different mechanism than what happens on Earth. These large rocky worlds could have a subsurface ocean of hot magma called a basal magma ocean. This magma could produce magnetic fields even stronger than Earth’s. As lead author Miki Nakajima at the University of Rochester explained:

A strong magnetic field is very important for life on a planet, but most of the terrestrial planets in the solar system, such as Venus and Mars, do not have them because their cores don’t have the right physical conditions to generate a magnetic field. However, super-Earths can produce dynamos in their core and/or magma, which can increase their planetary habitability.

Artist’s concept of L 98-59 d, a super-Earth world 35 light-years away. Image via NASA.

Simulating super-Earth magnetic fields

To find out if super-Earths could have magnetic fields, the researchers needed to simulate conditions inside them. Super-Earths are larger than Earth, and so they have immense pressures inside them. That means they could have long-lasting basal magma oceans and, therefore, magnetic fields.

To test that hypothesis, the researchers studied molten rock under similar conditions to what would happen in a basal magma ocean inside a super-Earth. They conducted laser shock experiments at the University of Rochester’s Laboratory for Laser Energetics. They then combined the data with quantum mechanical simulations and planetary evolution models.

The result? They found that the molten rock became electrically conductive. In fact, the magma was able to produce a powerful magnetic field stronger than Earth’s. In addition, the magnetic field could last for billions of years. That’s good news in terms of potential habitability. Nakajima said:

This work was exciting and challenging, given that my background is primarily computational and this was my first experimental work. I’m very grateful for the support from my collaborators from various research fields to conduct this interdisciplinary work. I cannot wait for future magnetic field observations of exoplanets to test our hypothesis.

Miki Nakajima at Rochester University in New York led the new study about super-Earths and their magnetic fields. Image via University of Rochester.

Potentially habitable super-Earths

There’s still a lot we don’t know about super-Earths. This includes whether they can truly be habitable. They are rocky like Earth, but bigger and more massive. How would that affect conditions on the surface?

But a powerful magnetic field would be hugely beneficial. Just as Earth’s magnetic field helps protect life on the surface by blocking deadly radiation from the sun, the same could apply to super-Earths.

Super-Earths are surprisingly common

Super-Earths are some of the most common exoplanets that astronomers have found so far. That was a bit surprising to astronomers, because our own solar system doesn’t have one. But that makes them all the more intriguing.

How many are there in our galaxy? How do they form? Can they support life? These are all questions that scientists are seeking the answers to. And if any of them are indeed confirmed to have magnetic fields, that will make them even more enticing in the search for life elsewhere.

Bottom line: A new study said powerful magnetic fields on super-Earths could help shield them from radiation from their stars, making them potentially more friendly to life.

Source: Electrical conductivities of (Mg,Fe)O at extreme pressures and implications for planetary magma oceans

Via University of Rochester

Read more: Super-Earth 18 light-years away sparks hope for life in space

Read more: Eyeball ocean world? Webb reveals an intriguing super-Earth

The post Powerful magnetic fields on super-Earths could boost chances of life first appeared on EarthSky.

from EarthSky https://ift.tt/FdgMSol

New clues to woolly rhino extinction found in wolf’s stomach

Scientists found a piece of woolly rhino tissue in the stomach of this 14,400-year-old wolf pup. Genomic analysis of that rhino tissue and 2 other specimens indicate the species went extinct relatively fast. Image via Mietje Germonpré/ Stockholm University.

• Scientists found woolly rhino tissue inside the stomach of a 14,400-year-old frozen wolf pup in Siberia.
• Genomic analysis showed woolly rhinos stayed genetically healthy until a rapid population collapse near the end of the last Ice Age.
• Researchers believe sudden climate warming played a key role in the species’ quick extinction.

EarthSky’s 2026 lunar calendar is available now. Get yours today! Makes a great gift.

Tissue in 14,400-year-old wolf pup belonged to a woolly rhino

As permafrost in far northern and southern latitudes thaws, people have found the remains of ancient animals, tens of thousands of years old. One wolf pup, buried for 14,400 years in the frozen ground at Tumat in northeastern Siberia, had a surprise inside. Scientists found a piece of tissue in its stomach. On January 15, 2026, researchers at Stockholm University said DNA analysis identified it as a now-extinct woolly rhinoceros (Coelodonta antiquitati). Plus, additional genomic analysis of this rhino and two others indicate woolly rhinos remained genetically healthy till the end of the last ice age. Then they underwent a sharp population collapse due to a rapidly changing climate.

Camilo Chacón-Duque of Stockholm University is a co-author of the new paper on these results. He said:

Sequencing the entire genome of an Ice Age animal found in the stomach of another animal has never been done before.

Recovering genomes from individuals that lived right before extinction is challenging, but it can provide important clues on what caused the species to disappear, which may also be relevant for the conservation of endangered species today.

The researchers published their findings in the peer-reviewed journal Genome Biology and Evolution on January 14, 2026.

Woolly rhinos once roamed northern Eurasia

Woolly rhinos were well-adapted for ice age conditions. These hefty creatures had brown fur coats and were insulated by thick layers of fat under the skin. They grazed in cold tundra grasslands of Northern Europe and Asia during the Middle and Late Pleistocene (spanning 774,100 to 11,700 years ago).

These rhinos were about 11 feet (3.3 m) long from head to tail, comparable in size to the white rhinoceros. But the woolly rhino had a longer head and body, and shorter legs. In addition, it had small ears and a short tail, which were adaptations to minimize heat loss. Moreover, the impressive horn on its head may have been used in fights and perhaps to push away snow covering the grass.

There is archaeological evidence that humans hunted or scavenged woolly rhinos, but scientists don’t know if this happened frequently. For instance, bones found in some caves in Europe show signs of cut marks and breaks. Early modern humans even used woolly rhino bones to make tools and weapons. Remarkably, they also depicted woolly rhinos in their art, such as in cave paintings and even as statuettes.

This is artist Benjamin Langlois’ depiction of how the woolly rhino may have appeared in life. Image via Mr Langlois10/ Wikimedia Commons. (CC BY-SA 4.0)

A challenging analysis of tissue from a wolf’s stomach

Scientists used radiocarbon dating to age the wolf pup and the tissue in its stomach. Their results showed both were 14,400 years old. Subsequent DNA analysis of the tissue revealed it belonged to a woolly rhinoceros.

This rhino was a large animal. Therefore, the researchers think the wolves did not hunt it, but instead scavenged a carcass. What’s remarkable about this find is that it was – at 14,400 years old – the youngest woolly rhino tissue sample ever found. Moreover, researchers dated it to just a few centuries before the species became extinct, about 14,000 years ago.

The tissue, just 1.6 by 1.2 inches (4 cm by 3 cm) large, ended up in the wolf shortly before it died. Still, mapping the genome proved to be difficult because DNA degrades over time, and parts of the sample contained wolf DNA.

Lead author Sólveig Guðjónsdóttir of Stockholm University said:

It was really exciting, but also very challenging, to extract a complete genome from such an unusual sample.

The woolly rhino tissue recovered from the wolf pup’s stomach. Image via Love Dalén/ Stockholm University.

What happened to the woolly rhino?

The researchers also examined the genome of two other woolly rhinoceros specimens, from 18,000 and 49,000 years ago. They wanted to compare the three samples to study changes in the diversity of the genomes, the level of inbreeding and harmful mutations.

If the woolly rhino population had gradually dwindled to low numbers, the researchers would have seen signs of inbreeding and a rise in genetic mutations in the 14,400-year-old sample from the wolf’s stomach.

Instead, they found the opposite. Co-author Edana Lord of Stockholm University remarked:

Our analyses showed a surprisingly stable genetic pattern with no change in inbreeding levels through tens of thousands of years prior to the extinction of woolly rhinos.

Therefore, the scientists concluded, extinction happened relatively quickly. They think it occurred during a period in geological history known as the Bølling–Allerød interstadial (14,690 to 12,890 years ago). That’s when the Northern Hemisphere warmed abruptly. The change in climate increased rainfall, transforming the rhinos’ grassy plains to one of trees and shrubs.

Bottom line: Scientists found tissue from a woolly rhino in the stomach of a 14,400-year-old frozen wolf. Genomic analysis of the tissue indicates woolly rhinos became extinct relatively quickly.

Source: Genome Shows no Recent Inbreeding in Near-Extinction Woolly Rhinoceros Sample Found in Ancient Wolf’s Stomach

Via Stockholm University

Read more: Why did woolly mammoths go extinct?

Read more: Rhinoceroses: Can modern science save these gentle giants?

The post New clues to woolly rhino extinction found in wolf’s stomach first appeared on EarthSky.

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Scientists found a piece of woolly rhino tissue in the stomach of this 14,400-year-old wolf pup. Genomic analysis of that rhino tissue and 2 other specimens indicate the species went extinct relatively fast. Image via Mietje Germonpré/ Stockholm University.

• Scientists found woolly rhino tissue inside the stomach of a 14,400-year-old frozen wolf pup in Siberia.
• Genomic analysis showed woolly rhinos stayed genetically healthy until a rapid population collapse near the end of the last Ice Age.
• Researchers believe sudden climate warming played a key role in the species’ quick extinction.

EarthSky’s 2026 lunar calendar is available now. Get yours today! Makes a great gift.

Tissue in 14,400-year-old wolf pup belonged to a woolly rhino

As permafrost in far northern and southern latitudes thaws, people have found the remains of ancient animals, tens of thousands of years old. One wolf pup, buried for 14,400 years in the frozen ground at Tumat in northeastern Siberia, had a surprise inside. Scientists found a piece of tissue in its stomach. On January 15, 2026, researchers at Stockholm University said DNA analysis identified it as a now-extinct woolly rhinoceros (Coelodonta antiquitati). Plus, additional genomic analysis of this rhino and two others indicate woolly rhinos remained genetically healthy till the end of the last ice age. Then they underwent a sharp population collapse due to a rapidly changing climate.

Camilo Chacón-Duque of Stockholm University is a co-author of the new paper on these results. He said:

Sequencing the entire genome of an Ice Age animal found in the stomach of another animal has never been done before.

Recovering genomes from individuals that lived right before extinction is challenging, but it can provide important clues on what caused the species to disappear, which may also be relevant for the conservation of endangered species today.

The researchers published their findings in the peer-reviewed journal Genome Biology and Evolution on January 14, 2026.

Woolly rhinos once roamed northern Eurasia

Woolly rhinos were well-adapted for ice age conditions. These hefty creatures had brown fur coats and were insulated by thick layers of fat under the skin. They grazed in cold tundra grasslands of Northern Europe and Asia during the Middle and Late Pleistocene (spanning 774,100 to 11,700 years ago).

These rhinos were about 11 feet (3.3 m) long from head to tail, comparable in size to the white rhinoceros. But the woolly rhino had a longer head and body, and shorter legs. In addition, it had small ears and a short tail, which were adaptations to minimize heat loss. Moreover, the impressive horn on its head may have been used in fights and perhaps to push away snow covering the grass.

There is archaeological evidence that humans hunted or scavenged woolly rhinos, but scientists don’t know if this happened frequently. For instance, bones found in some caves in Europe show signs of cut marks and breaks. Early modern humans even used woolly rhino bones to make tools and weapons. Remarkably, they also depicted woolly rhinos in their art, such as in cave paintings and even as statuettes.

This is artist Benjamin Langlois’ depiction of how the woolly rhino may have appeared in life. Image via Mr Langlois10/ Wikimedia Commons. (CC BY-SA 4.0)

A challenging analysis of tissue from a wolf’s stomach

Scientists used radiocarbon dating to age the wolf pup and the tissue in its stomach. Their results showed both were 14,400 years old. Subsequent DNA analysis of the tissue revealed it belonged to a woolly rhinoceros.

This rhino was a large animal. Therefore, the researchers think the wolves did not hunt it, but instead scavenged a carcass. What’s remarkable about this find is that it was – at 14,400 years old – the youngest woolly rhino tissue sample ever found. Moreover, researchers dated it to just a few centuries before the species became extinct, about 14,000 years ago.

The tissue, just 1.6 by 1.2 inches (4 cm by 3 cm) large, ended up in the wolf shortly before it died. Still, mapping the genome proved to be difficult because DNA degrades over time, and parts of the sample contained wolf DNA.

Lead author Sólveig Guðjónsdóttir of Stockholm University said:

It was really exciting, but also very challenging, to extract a complete genome from such an unusual sample.

The woolly rhino tissue recovered from the wolf pup’s stomach. Image via Love Dalén/ Stockholm University.

What happened to the woolly rhino?

The researchers also examined the genome of two other woolly rhinoceros specimens, from 18,000 and 49,000 years ago. They wanted to compare the three samples to study changes in the diversity of the genomes, the level of inbreeding and harmful mutations.

If the woolly rhino population had gradually dwindled to low numbers, the researchers would have seen signs of inbreeding and a rise in genetic mutations in the 14,400-year-old sample from the wolf’s stomach.

Instead, they found the opposite. Co-author Edana Lord of Stockholm University remarked:

Our analyses showed a surprisingly stable genetic pattern with no change in inbreeding levels through tens of thousands of years prior to the extinction of woolly rhinos.

Therefore, the scientists concluded, extinction happened relatively quickly. They think it occurred during a period in geological history known as the Bølling–Allerød interstadial (14,690 to 12,890 years ago). That’s when the Northern Hemisphere warmed abruptly. The change in climate increased rainfall, transforming the rhinos’ grassy plains to one of trees and shrubs.

Bottom line: Scientists found tissue from a woolly rhino in the stomach of a 14,400-year-old frozen wolf. Genomic analysis of the tissue indicates woolly rhinos became extinct relatively quickly.

Source: Genome Shows no Recent Inbreeding in Near-Extinction Woolly Rhinoceros Sample Found in Ancient Wolf’s Stomach

Via Stockholm University

Read more: Why did woolly mammoths go extinct?

Read more: Rhinoceroses: Can modern science save these gentle giants?

The post New clues to woolly rhino extinction found in wolf’s stomach first appeared on EarthSky.

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Deepfakes are flooding the web, and anyone can make them

AI image and video generators now produce fully lifelike content. Siwei Lyu, a professor of computer science and engineering at the University at Buffalo said deepfakes are flooding the internet, and they will only be more prevalent in 2026. Siwei Lyu generated this AI image using Google Gemini 3. Image via Siwei Lyu using Google Gemini 3/ The Conversation.

• Deepfakes are AI-generated images and videos that often fool viewers into believing they’re real. They are exploding on the internet, and anyone can create them.
• A cybersecurity firm estimated an increase from roughly 500,000 online deepfakes in 2023 to about 8 million in 2025, with annual growth nearing 900%.
• In 2026, deepfakes will likely only get harder to recognize. They’re moving toward real-time synthesis that can produce videos that closely resemble the nuances of a human’s appearance, making it easier for them to evade detection systems.

By Siwei Lyu, University at Buffalo

Deepfakes are flooding the internet

Over the course of 2025, deepfakes improved dramatically. AI-generated faces, voices and full-body performances that mimic real people increased in quality far beyond what even many experts expected would be the case just a few years ago. They were also increasingly used to deceive people.

For many everyday scenarios – especially low-resolution video calls and media shared on social media platforms – their realism is now high enough to reliably fool nonexpert viewers. In practical terms, synthetic media have become indistinguishable from authentic recordings for ordinary people and, in some cases, even for institutions.

And this surge is not limited to quality. The volume of deepfakes has grown explosively: Cybersecurity firm DeepStrike estimates an increase from roughly 500,000 online deepfakes in 2023 to about 8 million in 2025, with annual growth nearing 900%.

I’m a computer scientist who researches deepfakes and other synthetic media. From my vantage point, I see that the situation is likely to get worse in 2026 as deepfakes become synthetic performers capable of reacting to people in real time.

Just about anyone can now make a deepfake video.

Dramatic improvements

Several technical shifts underlie this dramatic escalation. First, video realism made a significant leap thanks to video generation models designed specifically to maintain temporal consistency. These models produce videos that have coherent motion, consistent identities of the people portrayed, and content that makes sense from one frame to the next. The models disentangle the information related to representing a person’s identity from the information about motion so that the same motion can be mapped to different identities, or the same identity can have multiple types of motions.

These models produce stable, coherent faces without the flicker, warping or structural distortions around the eyes and jawline that once served as reliable forensic evidence of deepfakes.

Audio improvements

Second, voice cloning has crossed what I would call the “indistinguishable threshold.” A few seconds of audio now suffice to generate a convincing clone – complete with natural intonation, rhythm, emphasis, emotion, pauses and breathing noise. This capability is already fueling large-scale fraud. Some major retailers report receiving over 1,000 AI-generated scam calls per day. The perceptual tells that once gave away synthetic voices have largely disappeared.

Anyone can make deepfakes

Third, consumer tools have pushed the technical barrier almost to zero. Upgrades from OpenAI’s Sora 2 and Google’s Veo 3 and a wave of startups mean that anyone can describe an idea, let a large language model such as OpenAI’s ChatGPT or Google’s Gemini draft a script, and generate polished audio-visual media in minutes. AI agents can automate the entire process. The capacity to generate coherent, storyline-driven deepfakes at a large scale has effectively been democratized.

This combination of surging quantity and personas that are nearly indistinguishable from real humans creates serious challenges for detecting deepfakes, especially in a media environment where people’s attention is fragmented and content moves faster than it can be verified. There has already been real-world harm – from misinformation to targeted harassment and financial scams – enabled by deepfakes that spread before people have a chance to realize what’s happening.

AI researcher Hany Farid explains how deepfakes work and how good they’re getting.

The future is real time

Looking forward, the trajectory for next year is clear: Deepfakes are moving toward real-time synthesis that can produce videos that closely resemble the nuances of a human’s appearance, making it easier for them to evade detection systems. The frontier is shifting from static visual realism to temporal and behavioral coherence: models that generate live or near-live content rather than pre-rendered clips.

Identity modeling is converging into unified systems that capture not just how a person looks, but how they move, sound and speak across contexts. The result goes beyond “this resembles person X,” to “this behaves like person X over time.” I expect entire video-call participants to be synthesized in real time; interactive AI-driven actors whose faces, voices and mannerisms adapt instantly to a prompt; and scammers deploying responsive avatars rather than fixed videos.

As these capabilities mature, the perceptual gap between synthetic and authentic human media will continue to narrow. The meaningful line of defense will shift away from human judgment. Instead, it will depend on infrastructure-level protections. These include secure provenance such as media signed cryptographically, and AI content tools that use the Coalition for Content Provenance and Authenticity specifications. It will also depend on multimodal forensic tools such as my lab’s Deepfake-o-Meter.

Simply looking harder at pixels will no longer be adequate.

Siwei Lyu, Professor of Computer Science and Engineering; Director, UB Media Forensic Lab, University at Buffalo

This article is republished from The Conversation under a Creative Commons license. Read the original article.

Bottom line: Deepfakes are AI-generated images and videos that often fool viewers into believing they are real. They are exploding on the internet, and anyone can create them.

Read more: Spot a fake, AI-generated image by looking at the eyes

The post Deepfakes are flooding the web, and anyone can make them first appeared on EarthSky.

from EarthSky https://ift.tt/fhvRLOj

AI image and video generators now produce fully lifelike content. Siwei Lyu, a professor of computer science and engineering at the University at Buffalo said deepfakes are flooding the internet, and they will only be more prevalent in 2026. Siwei Lyu generated this AI image using Google Gemini 3. Image via Siwei Lyu using Google Gemini 3/ The Conversation.

• Deepfakes are AI-generated images and videos that often fool viewers into believing they’re real. They are exploding on the internet, and anyone can create them.
• A cybersecurity firm estimated an increase from roughly 500,000 online deepfakes in 2023 to about 8 million in 2025, with annual growth nearing 900%.
• In 2026, deepfakes will likely only get harder to recognize. They’re moving toward real-time synthesis that can produce videos that closely resemble the nuances of a human’s appearance, making it easier for them to evade detection systems.

By Siwei Lyu, University at Buffalo

Deepfakes are flooding the internet

Over the course of 2025, deepfakes improved dramatically. AI-generated faces, voices and full-body performances that mimic real people increased in quality far beyond what even many experts expected would be the case just a few years ago. They were also increasingly used to deceive people.

For many everyday scenarios – especially low-resolution video calls and media shared on social media platforms – their realism is now high enough to reliably fool nonexpert viewers. In practical terms, synthetic media have become indistinguishable from authentic recordings for ordinary people and, in some cases, even for institutions.

And this surge is not limited to quality. The volume of deepfakes has grown explosively: Cybersecurity firm DeepStrike estimates an increase from roughly 500,000 online deepfakes in 2023 to about 8 million in 2025, with annual growth nearing 900%.

I’m a computer scientist who researches deepfakes and other synthetic media. From my vantage point, I see that the situation is likely to get worse in 2026 as deepfakes become synthetic performers capable of reacting to people in real time.

Just about anyone can now make a deepfake video.

Dramatic improvements

Several technical shifts underlie this dramatic escalation. First, video realism made a significant leap thanks to video generation models designed specifically to maintain temporal consistency. These models produce videos that have coherent motion, consistent identities of the people portrayed, and content that makes sense from one frame to the next. The models disentangle the information related to representing a person’s identity from the information about motion so that the same motion can be mapped to different identities, or the same identity can have multiple types of motions.

These models produce stable, coherent faces without the flicker, warping or structural distortions around the eyes and jawline that once served as reliable forensic evidence of deepfakes.

Audio improvements

Second, voice cloning has crossed what I would call the “indistinguishable threshold.” A few seconds of audio now suffice to generate a convincing clone – complete with natural intonation, rhythm, emphasis, emotion, pauses and breathing noise. This capability is already fueling large-scale fraud. Some major retailers report receiving over 1,000 AI-generated scam calls per day. The perceptual tells that once gave away synthetic voices have largely disappeared.

Anyone can make deepfakes

Third, consumer tools have pushed the technical barrier almost to zero. Upgrades from OpenAI’s Sora 2 and Google’s Veo 3 and a wave of startups mean that anyone can describe an idea, let a large language model such as OpenAI’s ChatGPT or Google’s Gemini draft a script, and generate polished audio-visual media in minutes. AI agents can automate the entire process. The capacity to generate coherent, storyline-driven deepfakes at a large scale has effectively been democratized.

This combination of surging quantity and personas that are nearly indistinguishable from real humans creates serious challenges for detecting deepfakes, especially in a media environment where people’s attention is fragmented and content moves faster than it can be verified. There has already been real-world harm – from misinformation to targeted harassment and financial scams – enabled by deepfakes that spread before people have a chance to realize what’s happening.

AI researcher Hany Farid explains how deepfakes work and how good they’re getting.

The future is real time

Looking forward, the trajectory for next year is clear: Deepfakes are moving toward real-time synthesis that can produce videos that closely resemble the nuances of a human’s appearance, making it easier for them to evade detection systems. The frontier is shifting from static visual realism to temporal and behavioral coherence: models that generate live or near-live content rather than pre-rendered clips.

Identity modeling is converging into unified systems that capture not just how a person looks, but how they move, sound and speak across contexts. The result goes beyond “this resembles person X,” to “this behaves like person X over time.” I expect entire video-call participants to be synthesized in real time; interactive AI-driven actors whose faces, voices and mannerisms adapt instantly to a prompt; and scammers deploying responsive avatars rather than fixed videos.

As these capabilities mature, the perceptual gap between synthetic and authentic human media will continue to narrow. The meaningful line of defense will shift away from human judgment. Instead, it will depend on infrastructure-level protections. These include secure provenance such as media signed cryptographically, and AI content tools that use the Coalition for Content Provenance and Authenticity specifications. It will also depend on multimodal forensic tools such as my lab’s Deepfake-o-Meter.

Simply looking harder at pixels will no longer be adequate.

Siwei Lyu, Professor of Computer Science and Engineering; Director, UB Media Forensic Lab, University at Buffalo

This article is republished from The Conversation under a Creative Commons license. Read the original article.

Bottom line: Deepfakes are AI-generated images and videos that often fool viewers into believing they are real. They are exploding on the internet, and anyone can create them.

Read more: Spot a fake, AI-generated image by looking at the eyes

The post Deepfakes are flooding the web, and anyone can make them first appeared on EarthSky.

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Orion the Hunter is easy to spot in January

EarthSky founder Deborah Byrd wants you to come to know the constellation Orion the Hunter. It’s one of the most famous constellations because it’s easy to identify, with several noticeably bright and interesting stars. Plus, Orion can help you visualize your place in the Milky Way galaxy. What’s not to like? Click here for the video. Prefer to read? See below!

Tonight look for the constellation Orion the Hunter. It’s a constant companion on winter evenings in the Northern Hemisphere, and on summer nights in the Southern Hemisphere. Plus, it’s probably the easiest constellation to spot thanks to its distinctive Belt. Orion’s Belt consists of three medium-bright stars in a short, straight row at the Hunter’s waistline. So if you see any three equally bright stars in a row this evening, you’re probably looking at Orion. Do you want to be sure? There are two even brighter stars – one reddish and the other blue – on either side of the Belt stars.

If you want to learn just one constellation … this is a good one! And it’s a very easy constellation to spot. Those of us in the Northern Hemisphere see Orion the Hunter arcing across the southern sky on January evenings. Southern Hemisphere? Turn this chart upside-down, and look in your northern sky. To see a precise view from your location, try Stellarium Online.

When to look for Orion

As seen from mid-northern latitudes, you’ll find Orion in the southeast in the January early evening and shining high in the south by mid-to-late evening (around 9 to 10 p.m. local time, the time on your clock wherever you live). If you live at temperate latitudes south of the equator, you’ll see Orion high in your northern sky around that same hour.

View at EarthSky Community Photos. | Aayan Shaikh in Sindhudurg, Maharashtra, India, shared this image of the constellation Orion the Hunter on November 21, 2025, and wrote: “One of the brightest and most iconic winter constellations. It contains one of the brightest nebulas of the sky, the Orion nebula.” Thank you, Aayan!

What to look for in Orion the Hunter

First, look for the two brightest stars in Orion: Betelgeuse and Rigel. Rigel’s distance is approximately 860 light-years. However, the distance to Betelgeuse has been harder for scientists to determine. The current estimate is about 700 light-years away, but uncertainties remain.

Betelgeuse dimmed for a while in late 2019, generating a fair amount of excitement, because Betelgeuse is a star on the brink of a supernova. However, the star has since returned to its normal brightness. So how bright does it look tonight?

Also, a recent study confirmed Betelgeuse is not one star, but two! It’s companion star has been Betelbuddy.

Read more: Betelgeuse’s companion star leaves detectable wake

Next, take a moment to trace the Belt of Orion and the Sword that hangs from his belt. If one of the stars in the Sword looks blurry to you, that’s because you’re actually seeing the Orion Nebula. And if you use binoculars or a telescope to look at the Orion Nebula, you’ll start to see some shape in the gas and dust cloud.

View at EarthSky Community Photos. | Shivam Sanap imaged the Orion Nebula on August 2, 2025, from India, and wrote: “I captured the Orion nebula after a lot of hard work, and the results are truly amazing!”. Thank you, Shivam!

Connections between the stars

While the stars of constellations often look like they should be physically related and gravitationally bound, they usually are not.

However, some of Orion’s most famous stars do have a connection. Several of the brightest stars in Orion are members of our local spiral arm, sometimes called the Orion Arm or sometimes the Orion Spur of the Milky Way. Our local spiral arm lies between the Sagittarius and Perseus Arms of the Milky Way.

Now consider those three prominent Belt stars. They appear fainter than Rigel or Betelgeuse, and, not surprisingly, they’re farther away. As a matter of fact, they’re all giant stars located in the Orion Arm. These stars’ names and approximate distances are Mintaka (1,200 light-years), Alnilam (2,000 light-years), and Alnitak (1,260 light-years). When you look at these three stars, know that you’re looking across vast space, and into our local arm of the Milky Way galaxy.

View larger. | Artist’s concept of part of the Milky Way galaxy. Our sun is located in the Orion Arm, or Orion Spur, of the Milky Way. Several bright stars in Orion, including Rigel, Betelgeuse, the three stars in Orion’s Belt, and the Orion Nebula, also reside in the Orion Arm. Image via R. Hurt/ Wikimedia Commons (public domain).

Bottom line: Orion the Hunter is one of the easiest constellations to identify thanks to Orion’s Belt, the three medium-bright stars in a short, straight row at his waist.

Why do stars seem brighter in winter?

The post Orion the Hunter is easy to spot in January first appeared on EarthSky.

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EarthSky founder Deborah Byrd wants you to come to know the constellation Orion the Hunter. It’s one of the most famous constellations because it’s easy to identify, with several noticeably bright and interesting stars. Plus, Orion can help you visualize your place in the Milky Way galaxy. What’s not to like? Click here for the video. Prefer to read? See below!

Tonight look for the constellation Orion the Hunter. It’s a constant companion on winter evenings in the Northern Hemisphere, and on summer nights in the Southern Hemisphere. Plus, it’s probably the easiest constellation to spot thanks to its distinctive Belt. Orion’s Belt consists of three medium-bright stars in a short, straight row at the Hunter’s waistline. So if you see any three equally bright stars in a row this evening, you’re probably looking at Orion. Do you want to be sure? There are two even brighter stars – one reddish and the other blue – on either side of the Belt stars.

If you want to learn just one constellation … this is a good one! And it’s a very easy constellation to spot. Those of us in the Northern Hemisphere see Orion the Hunter arcing across the southern sky on January evenings. Southern Hemisphere? Turn this chart upside-down, and look in your northern sky. To see a precise view from your location, try Stellarium Online.

When to look for Orion

As seen from mid-northern latitudes, you’ll find Orion in the southeast in the January early evening and shining high in the south by mid-to-late evening (around 9 to 10 p.m. local time, the time on your clock wherever you live). If you live at temperate latitudes south of the equator, you’ll see Orion high in your northern sky around that same hour.

View at EarthSky Community Photos. | Aayan Shaikh in Sindhudurg, Maharashtra, India, shared this image of the constellation Orion the Hunter on November 21, 2025, and wrote: “One of the brightest and most iconic winter constellations. It contains one of the brightest nebulas of the sky, the Orion nebula.” Thank you, Aayan!

What to look for in Orion the Hunter

First, look for the two brightest stars in Orion: Betelgeuse and Rigel. Rigel’s distance is approximately 860 light-years. However, the distance to Betelgeuse has been harder for scientists to determine. The current estimate is about 700 light-years away, but uncertainties remain.

Betelgeuse dimmed for a while in late 2019, generating a fair amount of excitement, because Betelgeuse is a star on the brink of a supernova. However, the star has since returned to its normal brightness. So how bright does it look tonight?

Also, a recent study confirmed Betelgeuse is not one star, but two! It’s companion star has been Betelbuddy.

Read more: Betelgeuse’s companion star leaves detectable wake

Next, take a moment to trace the Belt of Orion and the Sword that hangs from his belt. If one of the stars in the Sword looks blurry to you, that’s because you’re actually seeing the Orion Nebula. And if you use binoculars or a telescope to look at the Orion Nebula, you’ll start to see some shape in the gas and dust cloud.

View at EarthSky Community Photos. | Shivam Sanap imaged the Orion Nebula on August 2, 2025, from India, and wrote: “I captured the Orion nebula after a lot of hard work, and the results are truly amazing!”. Thank you, Shivam!

Connections between the stars

While the stars of constellations often look like they should be physically related and gravitationally bound, they usually are not.

However, some of Orion’s most famous stars do have a connection. Several of the brightest stars in Orion are members of our local spiral arm, sometimes called the Orion Arm or sometimes the Orion Spur of the Milky Way. Our local spiral arm lies between the Sagittarius and Perseus Arms of the Milky Way.

Now consider those three prominent Belt stars. They appear fainter than Rigel or Betelgeuse, and, not surprisingly, they’re farther away. As a matter of fact, they’re all giant stars located in the Orion Arm. These stars’ names and approximate distances are Mintaka (1,200 light-years), Alnilam (2,000 light-years), and Alnitak (1,260 light-years). When you look at these three stars, know that you’re looking across vast space, and into our local arm of the Milky Way galaxy.

View larger. | Artist’s concept of part of the Milky Way galaxy. Our sun is located in the Orion Arm, or Orion Spur, of the Milky Way. Several bright stars in Orion, including Rigel, Betelgeuse, the three stars in Orion’s Belt, and the Orion Nebula, also reside in the Orion Arm. Image via R. Hurt/ Wikimedia Commons (public domain).

Bottom line: Orion the Hunter is one of the easiest constellations to identify thanks to Orion’s Belt, the three medium-bright stars in a short, straight row at his waist.

Why do stars seem brighter in winter?

The post Orion the Hunter is easy to spot in January first appeared on EarthSky.

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Severe geomagnetic storm! What happened to the auroras?

View at EarthSky Community Photos. | Ross Stone captured this glowing aurora from the edge of Death Valley National Park last night. Thank you, Ross! Amid a severe geomagnetic storm, expectations were high for stunning auroral displays down to mid-latitudes, but the auroras were weaker and less widespread than expected. Read on to find out why.

On the evening of January 18, 2026, the sun unleashed a powerful X1.9 solar flare. This intense burst of energy launched a fast burst of solar material and magnetic fields – a coronal mass ejection (CME) – toward Earth. And when it reached our planet on the evening of January 19, it produced a rare G4 (severe) geomagnetic storm.

But while a severe storm holds the potential to trigger beautiful auroras at mid-latitudes, this storm’s real-world effects were surprisingly limited. Why? It was due to the storm’s magnetic makeup. The arrangement of the CME’s magnetic field limited how much energy actually reached Earth’s atmosphere, shaping which regions saw auroras and which did not.

EarthSky’s 2026 lunar calendar is available now. Get yours today! Makes a great gift.

Severe solar storm began with CME impact

The CME struck Earth’s magnetosphere at approximately 18:38 UTC on January 19, arriving with a sharp shock that immediately disturbed Earth’s magnetic field.

To understand what happened next, you need to know what Bz is. Bz describes whether the sun’s magnetic field is pointing north or south. This magnetic field is carried out into the solar system through the solar wind. And if the Bz is southward, it’s much easier for this solar wind to rush into Earth’s magnetosphere, or the magnetic bubble around our planet.

During the CME’s initial impact phase, the Bz briefly dipped strongly southward. So that allowed solar wind energy to flow efficiently into Earth’s magnetic field. This short-lived interaction quickly caused G4 (severe) geomagnetic storm levels, with Kp (another measure of Earth’s magnetic disturbance) exceeding 8.

Soon after the initial impact, the character of the severe geomagnetic storm changed dramatically. As Earth moved deeper into the core of the CME, the Bz – again, the orientation of the sun’s magnetic field – turned strongly northward.

This sustained northward orientation sharply limited the transfer of transfer into Earth’s magnetosphere. And that was what restricted the auroras, despite the overall strength of the storm.

This is why geomagnetic storm ratings can mislead

Conditions shifted southward again around 5:14 UTC on January 20, but the reversal was modest and short-lived. While this allowed for some renewed geomagnetic response, it was not sufficient to drive widespread auroras into mid or lower latitudes.

As a result, auroral activity remained largely confined to higher latitudes, even though the storm rating suggested a much wider impact. This severe solar storm clearly illustrates why Kp values and NOAA storm ratings alone do not fully describe auroral visibility or real-world effects.

Severe geomagnetic storm coincided with intense radiation event

Adding to the space weather complexity, the same X1.9 flare also triggered a solar radiation storm that reached S4 (severe) levels, making it the largest event in more than 20 years.

These storms occur when magnetic activity accelerates charged particles in the solar atmosphere to very high velocities. After making the journey to Earth in just tens of minutes, these then rain down at the poles. This can expose astronauts and those in high-latitude aircraft to increased radiation.

Not over yet

By the numbers, this was certainly a severe geomagnetic storm. But in practice, it was a selective and magnetically constrained event driven by an extremely strong CME. It is a reminder that space weather impacts depend on magnetic geometry, not just raw intensity.

This is what makes following space weather and chasing auroras both exciting and frustrating. Ultimately, it’s so rewarding when the sky finally delivers a spectacular show.

It should also be noted that the storm is not yet over – there could be more surprises tonight, January 20. Read our daily sun news for more information.

Bottom line: A powerful blast from the sun triggered a severe geomagnetic storm on the night of January 19, but the auroras weren’t as widespread as hoped. It’s because storm strength isn’t the only factor affecting auroras.

The post Severe geomagnetic storm! What happened to the auroras? first appeared on EarthSky.

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View at EarthSky Community Photos. | Ross Stone captured this glowing aurora from the edge of Death Valley National Park last night. Thank you, Ross! Amid a severe geomagnetic storm, expectations were high for stunning auroral displays down to mid-latitudes, but the auroras were weaker and less widespread than expected. Read on to find out why.

On the evening of January 18, 2026, the sun unleashed a powerful X1.9 solar flare. This intense burst of energy launched a fast burst of solar material and magnetic fields – a coronal mass ejection (CME) – toward Earth. And when it reached our planet on the evening of January 19, it produced a rare G4 (severe) geomagnetic storm.

But while a severe storm holds the potential to trigger beautiful auroras at mid-latitudes, this storm’s real-world effects were surprisingly limited. Why? It was due to the storm’s magnetic makeup. The arrangement of the CME’s magnetic field limited how much energy actually reached Earth’s atmosphere, shaping which regions saw auroras and which did not.

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Severe solar storm began with CME impact

The CME struck Earth’s magnetosphere at approximately 18:38 UTC on January 19, arriving with a sharp shock that immediately disturbed Earth’s magnetic field.

To understand what happened next, you need to know what Bz is. Bz describes whether the sun’s magnetic field is pointing north or south. This magnetic field is carried out into the solar system through the solar wind. And if the Bz is southward, it’s much easier for this solar wind to rush into Earth’s magnetosphere, or the magnetic bubble around our planet.

During the CME’s initial impact phase, the Bz briefly dipped strongly southward. So that allowed solar wind energy to flow efficiently into Earth’s magnetic field. This short-lived interaction quickly caused G4 (severe) geomagnetic storm levels, with Kp (another measure of Earth’s magnetic disturbance) exceeding 8.

Soon after the initial impact, the character of the severe geomagnetic storm changed dramatically. As Earth moved deeper into the core of the CME, the Bz – again, the orientation of the sun’s magnetic field – turned strongly northward.

This sustained northward orientation sharply limited the transfer of transfer into Earth’s magnetosphere. And that was what restricted the auroras, despite the overall strength of the storm.

This is why geomagnetic storm ratings can mislead

Conditions shifted southward again around 5:14 UTC on January 20, but the reversal was modest and short-lived. While this allowed for some renewed geomagnetic response, it was not sufficient to drive widespread auroras into mid or lower latitudes.

As a result, auroral activity remained largely confined to higher latitudes, even though the storm rating suggested a much wider impact. This severe solar storm clearly illustrates why Kp values and NOAA storm ratings alone do not fully describe auroral visibility or real-world effects.

Severe geomagnetic storm coincided with intense radiation event

Adding to the space weather complexity, the same X1.9 flare also triggered a solar radiation storm that reached S4 (severe) levels, making it the largest event in more than 20 years.

These storms occur when magnetic activity accelerates charged particles in the solar atmosphere to very high velocities. After making the journey to Earth in just tens of minutes, these then rain down at the poles. This can expose astronauts and those in high-latitude aircraft to increased radiation.

Not over yet

By the numbers, this was certainly a severe geomagnetic storm. But in practice, it was a selective and magnetically constrained event driven by an extremely strong CME. It is a reminder that space weather impacts depend on magnetic geometry, not just raw intensity.

This is what makes following space weather and chasing auroras both exciting and frustrating. Ultimately, it’s so rewarding when the sky finally delivers a spectacular show.

It should also be noted that the storm is not yet over – there could be more surprises tonight, January 20. Read our daily sun news for more information.

Bottom line: A powerful blast from the sun triggered a severe geomagnetic storm on the night of January 19, but the auroras weren’t as widespread as hoped. It’s because storm strength isn’t the only factor affecting auroras.

The post Severe geomagnetic storm! What happened to the auroras? first appeared on EarthSky.

from EarthSky https://ift.tt/YWvfSBG