Andrea Luck
@andrealuck@fosstodon.org  ·  activity timestamp 7 days ago
The image is divided into four sections, each showing one of the gas giants against a black background as seen by JWST. Filters are near infrared and have been colorised. Top left: Jupiter. It appears as a large, round sphere with horizontal bands in shades of light brown, tan, and white. A bright white oval storm sits on the lower right side. A faint ring is visible alongside Europa, one of its satellites, which appears very bright with a star-shaped artifact. Top right: Saturn. It has a pale beige surface with soft horizontal shading. Surrounding it is a wide, bright ring system tilted diagonally. The rings look thin and sharply defined, with multiple subtle bands of light and dark. Bottom left: Uranus. It appears as a smooth blue-green sphere with some whitish circular clouds around the pole that is facing the observer. Surrounding it is a bright circular ring system made up of thin white lines. The rings form a bright, symmetrical halo around the planet. Bottom right: Neptune. It is a blue sphere with slightly brighter and darker circular features on its atmosphere. It also has a thin ring system, dimmer and less defined than Uranus’s in this image, appearing as a faint double oval around the planet. Each planet has its name printed below it in white capital letters.
The image is divided into four sections, each showing one of the gas giants against a black background as seen by JWST. Filters are near infrared and have been colorised. Top left: Jupiter. It appears as a large, round sphere with horizontal bands in shades of light brown, tan, and white. A bright white oval storm sits on the lower right side. A faint ring is visible alongside Europa, one of its satellites, which appears very bright with a star-shaped artifact. Top right: Saturn. It has a pale beige surface with soft horizontal shading. Surrounding it is a wide, bright ring system tilted diagonally. The rings look thin and sharply defined, with multiple subtle bands of light and dark. Bottom left: Uranus. It appears as a smooth blue-green sphere with some whitish circular clouds around the pole that is facing the observer. Surrounding it is a bright circular ring system made up of thin white lines. The rings form a bright, symmetrical halo around the planet. Bottom right: Neptune. It is a blue sphere with slightly brighter and darker circular features on its atmosphere. It also has a thin ring system, dimmer and less defined than Uranus’s in this image, appearing as a faint double oval around the planet. Each planet has its name printed below it in white capital letters.
The image is divided into four sections, each showing one of the gas giants against a black background as seen by JWST. Filters are near infrared and have been colorised. Top left: Jupiter. It appears as a large, round sphere with horizontal bands in shades of light brown, tan, and white. A bright white oval storm sits on the lower right side. A faint ring is visible alongside Europa, one of its satellites, which appears very bright with a star-shaped artifact. Top right: Saturn. It has a pale beige surface with soft horizontal shading. Surrounding it is a wide, bright ring system tilted diagonally. The rings look thin and sharply defined, with multiple subtle bands of light and dark. Bottom left: Uranus. It appears as a smooth blue-green sphere with some whitish circular clouds around the pole that is facing the observer. Surrounding it is a bright circular ring system made up of thin white lines. The rings form a bright, symmetrical halo around the planet. Bottom right: Neptune. It is a blue sphere with slightly brighter and darker circular features on its atmosphere. It also has a thin ring system, dimmer and less defined than Uranus’s in this image, appearing as a faint double oval around the planet. Each planet has its name printed below it in white capital letters.
Dr. John Barentine FRAS
@JohnBarentine@scicomm.xyz  ·  activity timestamp last week
The average number of satellite trails visible in each exposure is shown in relation to both the number of artificial satellites orbiting Earth (lower x axis) and epoch (upper x axis). Blue, SPHEREx; red, Xuntian; purple, ARRAKIHS; black, Hubble Space Telescope. Contours represent the 95% confidence levels for the mean number of trails. Horizontal solid line indicates one trail per exposure critical contamination level; vertical dotted line marks the current number of active and inactive satellites in orbit (15,000 as of March 2025).
The average number of satellite trails visible in each exposure is shown in relation to both the number of artificial satellites orbiting Earth (lower x axis) and epoch (upper x axis). Blue, SPHEREx; red, Xuntian; purple, ARRAKIHS; black, Hubble Space Telescope. Contours represent the 95% confidence levels for the mean number of trails. Horizontal solid line indicates one trail per exposure critical contamination level; vertical dotted line marks the current number of active and inactive satellites in orbit (15,000 as of March 2025).
The average number of satellite trails visible in each exposure is shown in relation to both the number of artificial satellites orbiting Earth (lower x axis) and epoch (upper x axis). Blue, SPHEREx; red, Xuntian; purple, ARRAKIHS; black, Hubble Space Telescope. Contours represent the 95% confidence levels for the mean number of trails. Horizontal solid line indicates one trail per exposure critical contamination level; vertical dotted line marks the current number of active and inactive satellites in orbit (15,000 as of March 2025).
podfeet boosted
ESO
@esoastronomy@mastodon.social  ·  activity timestamp last week
Daniel Pomarède
@pomarede@mastodon.social  ·  activity timestamp last week
GIF
GIF
This movie shows comet SWAN (circled) moving across the sky from Aug. 25 to Oct. 2, 2025. The movie was made by combining images from NASA’s PUNCH (Polarimeter to Unify the Corona and Heliosphere) mission that were not fully processed. Seams between individual images appear as black lines across the view. Bright objects have white spikes extending from them. Fainter stars and cosmic rays flicker in the background. The two bright objects the comet passes between (about halfway through the video) are the planet Mars (top) and the star Spica (bottom).
This movie shows comet SWAN (circled) moving across the sky from Aug. 25 to Oct. 2, 2025. The movie was made by combining images from NASA’s PUNCH (Polarimeter to Unify the Corona and Heliosphere) mission that were not fully processed. Seams between individual images appear as black lines across the view. Bright objects have white spikes extending from them. Fainter stars and cosmic rays flicker in the background. The two bright objects the comet passes between (about halfway through the video) are the planet Mars (top) and the star Spica (bottom).
Karl Urban boosted
Astronomy Picture of the Day
@apod@mastodon.bot  ·  activity timestamp last week
Andrea Luck
@andrealuck@fosstodon.org  ·  activity timestamp 7 days ago
The image is divided into four sections, each showing one of the gas giants against a black background as seen by JWST. Filters are near infrared and have been colorised. Top left: Jupiter. It appears as a large, round sphere with horizontal bands in shades of light brown, tan, and white. A bright white oval storm sits on the lower right side. A faint ring is visible alongside Europa, one of its satellites, which appears very bright with a star-shaped artifact. Top right: Saturn. It has a pale beige surface with soft horizontal shading. Surrounding it is a wide, bright ring system tilted diagonally. The rings look thin and sharply defined, with multiple subtle bands of light and dark. Bottom left: Uranus. It appears as a smooth blue-green sphere with some whitish circular clouds around the pole that is facing the observer. Surrounding it is a bright circular ring system made up of thin white lines. The rings form a bright, symmetrical halo around the planet. Bottom right: Neptune. It is a blue sphere with slightly brighter and darker circular features on its atmosphere. It also has a thin ring system, dimmer and less defined than Uranus’s in this image, appearing as a faint double oval around the planet. Each planet has its name printed below it in white capital letters.
The image is divided into four sections, each showing one of the gas giants against a black background as seen by JWST. Filters are near infrared and have been colorised. Top left: Jupiter. It appears as a large, round sphere with horizontal bands in shades of light brown, tan, and white. A bright white oval storm sits on the lower right side. A faint ring is visible alongside Europa, one of its satellites, which appears very bright with a star-shaped artifact. Top right: Saturn. It has a pale beige surface with soft horizontal shading. Surrounding it is a wide, bright ring system tilted diagonally. The rings look thin and sharply defined, with multiple subtle bands of light and dark. Bottom left: Uranus. It appears as a smooth blue-green sphere with some whitish circular clouds around the pole that is facing the observer. Surrounding it is a bright circular ring system made up of thin white lines. The rings form a bright, symmetrical halo around the planet. Bottom right: Neptune. It is a blue sphere with slightly brighter and darker circular features on its atmosphere. It also has a thin ring system, dimmer and less defined than Uranus’s in this image, appearing as a faint double oval around the planet. Each planet has its name printed below it in white capital letters.
The image is divided into four sections, each showing one of the gas giants against a black background as seen by JWST. Filters are near infrared and have been colorised. Top left: Jupiter. It appears as a large, round sphere with horizontal bands in shades of light brown, tan, and white. A bright white oval storm sits on the lower right side. A faint ring is visible alongside Europa, one of its satellites, which appears very bright with a star-shaped artifact. Top right: Saturn. It has a pale beige surface with soft horizontal shading. Surrounding it is a wide, bright ring system tilted diagonally. The rings look thin and sharply defined, with multiple subtle bands of light and dark. Bottom left: Uranus. It appears as a smooth blue-green sphere with some whitish circular clouds around the pole that is facing the observer. Surrounding it is a bright circular ring system made up of thin white lines. The rings form a bright, symmetrical halo around the planet. Bottom right: Neptune. It is a blue sphere with slightly brighter and darker circular features on its atmosphere. It also has a thin ring system, dimmer and less defined than Uranus’s in this image, appearing as a faint double oval around the planet. Each planet has its name printed below it in white capital letters.
Dr. John Barentine FRAS
@JohnBarentine@scicomm.xyz  ·  activity timestamp last week
The average number of satellite trails visible in each exposure is shown in relation to both the number of artificial satellites orbiting Earth (lower x axis) and epoch (upper x axis). Blue, SPHEREx; red, Xuntian; purple, ARRAKIHS; black, Hubble Space Telescope. Contours represent the 95% confidence levels for the mean number of trails. Horizontal solid line indicates one trail per exposure critical contamination level; vertical dotted line marks the current number of active and inactive satellites in orbit (15,000 as of March 2025).
The average number of satellite trails visible in each exposure is shown in relation to both the number of artificial satellites orbiting Earth (lower x axis) and epoch (upper x axis). Blue, SPHEREx; red, Xuntian; purple, ARRAKIHS; black, Hubble Space Telescope. Contours represent the 95% confidence levels for the mean number of trails. Horizontal solid line indicates one trail per exposure critical contamination level; vertical dotted line marks the current number of active and inactive satellites in orbit (15,000 as of March 2025).
The average number of satellite trails visible in each exposure is shown in relation to both the number of artificial satellites orbiting Earth (lower x axis) and epoch (upper x axis). Blue, SPHEREx; red, Xuntian; purple, ARRAKIHS; black, Hubble Space Telescope. Contours represent the 95% confidence levels for the mean number of trails. Horizontal solid line indicates one trail per exposure critical contamination level; vertical dotted line marks the current number of active and inactive satellites in orbit (15,000 as of March 2025).
ESO
@esoastronomy@mastodon.social  ·  activity timestamp last week
Daniel Pomarède
@pomarede@mastodon.social  ·  activity timestamp last week
GIF
GIF
This movie shows comet SWAN (circled) moving across the sky from Aug. 25 to Oct. 2, 2025. The movie was made by combining images from NASA’s PUNCH (Polarimeter to Unify the Corona and Heliosphere) mission that were not fully processed. Seams between individual images appear as black lines across the view. Bright objects have white spikes extending from them. Fainter stars and cosmic rays flicker in the background. The two bright objects the comet passes between (about halfway through the video) are the planet Mars (top) and the star Spica (bottom).
This movie shows comet SWAN (circled) moving across the sky from Aug. 25 to Oct. 2, 2025. The movie was made by combining images from NASA’s PUNCH (Polarimeter to Unify the Corona and Heliosphere) mission that were not fully processed. Seams between individual images appear as black lines across the view. Bright objects have white spikes extending from them. Fainter stars and cosmic rays flicker in the background. The two bright objects the comet passes between (about halfway through the video) are the planet Mars (top) and the star Spica (bottom).
Astronomy Picture of the Day
@apod@mastodon.bot  ·  activity timestamp last week
Marc
@corpsmoderne@mamot.fr  ·  activity timestamp last week
A camera on an equatorial mount pointed to the night sky on a balcony in a city. The screen shows a red cluster of stars (the pleiades) A hand holding a big metal switch comes into view. When the switch is turned on the screen switches off and the camera starts capturing images
nicki xaphania mouse 🐁
@xaphania@meemu.org  ·  activity timestamp 2 weeks ago
Marc boosted
Frank Adler
@adfr@pixelfed.social  ·  activity timestamp 2 weeks ago
Home Login