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#comet

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Public
grobi

Comet G3 ATLAS Setting over a Chilean Hill
* Video Credit & Copyright: Gabriel Muñoz
apod.nasa.gov/apod/ap250205.ht

Explanation:
Where is Comet ATLAS going? In the featured time-lapse video, the comet is not itself moving very much, but the Earth's rotation makes it appear to be setting over a hill. The Comet C/2024 G3 (ATLAS) sequence was captured with an ordinary camera on January 22 from the Araucanía Region in central Chile. Comet ATLAS has been an impressive site in the evening skies of Earth's Southern Hemisphere over the past few weeks, so bright and awe-inspiring that it may eventually become known as the Great Comet of 2025. Unfortunately, Comet G3 ATLAS is not going anywhere anymore because its central nucleus broke up during its close pass to the Sun last month. Some of the comet's scattered remains of rocks and ice will continue to orbit the Sun, some in nearly the same outward section of the orbit that the comet's nucleus would have taken.
en.wikipedia.org/wiki/Great_co
apod.nasa.gov/apod/ap250126.ht
instagram.com/p/DFdvObFxHO9/?i
apod.nasa.gov/apod/ap210921.ht
apod.nasa.gov/apod/ap090909.ht
skyandtelescope.org/astronomy-
science.nasa.gov/solar-system/
planetary.org/space-images/com
apod.nasa.gov/apod/ap240811.ht
earthobservatory.nasa.gov/

#space#comet#NASA
Public *
ESO

1/ We have to agree with astronomer David H. Levy here: "Comets are like #cats : they have tails, and they do precisely what they want."

Since you loved the images of #comet C/2024 G3 (ATLAS) that we shared recently, here are some more, taken from our Paranal Observatory in #Chile. This lovely #BlackAndWhite image was taken by our colleague Juan Beltrán, an engineer at Paranal.

➡️ eso.org/public/images/potw2505

📷 J. Beltrán/ESO

This black and white picture shows a small telescope and a large portion of the night sky. At the forefront, the silhouette of a small telescope reveals its small dome and central structure. Besides it stands a man, wearing a hood. The background of the picture shows the night sky, although only a few stars are visible, as well as a few short white strikes which indicate moving objects. The ’star’ of this composition, though, is the comet C/2024 G3 (ATLAS), which covers most of the frame and looks like a giant feather in the sky (or a bushy cat’s tail). The core of the comet (its tip) is bright white, while its tail becomes more diffuse as you go away from the core.
#astrodon#astronomy#astrophysics
Public
grobi

Comet G3 ATLAS Disintegrates
* Image Credit: Lionel Majzik
lionelmajzik.com/en/about

Explanation:
What's happening to Comet G3 ATLAS? After passing near the Sun in mid-January, the head of the comet has become dimmer and dimmer. By late January, Comet C/2024 G3 (ATLAS) had become a headless wonder -- even though it continued to show impressive tails after sunset in the skies of Earth's Southern Hemisphere. Pictured are images of Comet G3 ATLAS on successive January nights taken from Río Hurtado, Chile. Clearly, the comet's head is brighter and more centrally condensed on the earlier days (left) than on later days (right). A key reason is likely that the comet's nucleus of ice and rock, at the head's center, has fragmented. Comet G3 ATLAS passed well inside the orbit of planet Mercury when at its solar closest, a distance that where heat destroys many comets. Some of comet G3 ATLAS' scattering remains will continue to orbit the Sun.
en.wikipedia.org/wiki/C/2024_G
apod.nasa.gov/apod/ap250120.ht
apod.nasa.gov/apod/ap230903.ht
theskylive.com/c2024g3-info

newsweek.com/comet-atlas-disin

apod.nasa.gov/apod/ap240811.ht
science.nasa.gov/solar-system/
spaceplace.nasa.gov/comets/en/
anatomy-of-a-comet.en.jpg
apod.nasa.gov/apod/ap000808.ht
apod.nasa.gov/apod/ap010521.ht

science.nasa.gov/mercury/

earthobservatory.nasa.gov/
en.wikipedia.org/wiki/Southern
defcon.social/notifications

apod.nasa.gov/apod/ap250202.ht

2025 February 2 A series of comet images is shown. On the far left the image shows Comet G3 ATLAS with a bright central concentration at its head near the bottom of the frame. By the far right, this central concentration is nearly gone. Please see the explanation for more detailed information. Comet G3 ATLAS Disintegrates * Image Credit: Lionel Majzik Explanation: What's happening to Comet G3 ATLAS? After passing near the Sun in mid-January, the head of the comet has become dimmer and dimmer. By late January, Comet C/2024 G3 (ATLAS) had become a headless wonder -- even though it continued to show impressive tails after sunset in the skies of Earth's Southern Hemisphere. Pictured are images of Comet G3 ATLAS on successive January nights taken from Río Hurtado, Chile. Clearly, the comet's head is brighter and more centrally condensed on the earlier days (left) than on later days (right). A key reason is likely that the comet's nucleus of ice and rock, at the head's center, has fragmented. Comet G3 ATLAS passed well inside the orbit of planet Mercury when at its solar closest, a distance that where heat destroys many comets. Some of comet G3 ATLAS' scattering remains will continue to orbit the Sun. Authors & editors: Robert Nemiroff (MTU) & Jerry Bonnell (UMCP) NASA Official: Amber Straughn Specific rights apply. NASA Web Privacy, Accessibility, Notices; A service of: ASD at NASA / GSFC, NASA Science Activation & Michigan Tech. U.
#space#comet#NASA
Public
Paul Knightly
Comet NEOWISE (C/2020 F3) was the most visible comet to grace the Northern Hemisphere since Comet Hale-Bopp in 1997. I vaguely remember seeing Hale-Bopp as a kid, so being able to see a naked-eye comet of this magnitude was a real treat. This photo was taken in early July 2020 a couple hours away from home, under dark skies in northeast Oklahoma, USA.

This is a composite of about 30 images that I took using a star-tracker, allowing me to zoom in on the comet and move the camera slowly to keep up with Earth's rotation, enabling a clear image. There are some things I would do differently next time, but it speaks to how bright the comet was that even with my settings dialed back I still ended up with blown-out highlights.

#Comet #Astronomy #Space #Astrophotography
Comet NEOWISE arcs through the night sky. It's dual tail is visible reaching to the top of the image frame. The photo is edited to highlight the blue hue of the comet's gas and dust tails.
#astrophotography
Continued thread
Public
AkaSci 🛰️

Here is another beautiful image of the departing comet C/2024 G3 taken atop Cerro Pachón, in the foothills of the Chilean Andes, next to 3 NOIRLab-supported telescopes.

1. The Southern Astrophysical Research Telescope (SOAR) in the foreground.
2. Gemini South in the far left
3. The upcoming Vera C. Rubin Observatory in the center of the image.

noirlab.edu/public/images/iotw
Credit: CTIO/NOIRLab/NSF/AURA/C. Corco
#Comet
16/n

Comet C/2024 G3 (ATLAS) gleams against the January sky above three NOIRLab-supported telescopes in this Image of the Week. This is the first time that humans have observed this comet, which was last visible from Earth about 600,000 years ago. At perihelion, this comet reached an apparent magnitude of -3.8. This is about the same brightness as Venus, on the right side of the image, and potentially makes it the brightest comet of 2025. The straight lines across the sky are satellites, more prominently visible in this close-up. This image was taken atop Cerro Pachón, in the foothills of the Chilean Andes, next to the Southern Astrophysical Research Telescope (SOAR), a part of the U.S. National Science Foundation (NSF) Cerro Tololo Inter-American Observatory (CTIO), a Program of NSF NOIRLab. In the distance are two other observatories supported by NSF NOIRLab (left to right): Gemini South, one half of the International Gemini Observatory, funded in part by the NSF and operated by NSF NOIRLab, and the upcoming NSF–DOE Vera C. Rubin Observatory, jointly funded by the NSF and the U.S. Department of Energy (DOE) Office of Science. Credit: CTIO/NOIRLab/NSF/AURA/C. Corco
Public
rdm

Over the last week I've been going out every couple of nights and shooting C/2024 G3 Atlas as it slowly disintegrates after the front fell off.

Here are a couple more of my Dwarf3 shots, along with one from my phone. One is very heavily processed to bring out the side-tails.

20-50 frames of 15s at 80.

A comet without a head.There are faint secondary tails to the right.
A comet without a head, heavily post-processed to bring out the side tails, which form faint triangles to the right.
A wide-angle shot of the horizon and the sea, with most of the frame taken up with the evening sky. There is still a faint orange glow near the horizon, a long with the glow of the lights of three ships and Wadjemup. Near the middle of the frame is a comet, diving for the horizon.
#dwarf3#c2024g3#Comet
Public
rdm

Went comet chasing last night, got some great technically good shots. And this one. Which I love.

Taken when the comet was less than one degree above the horizon, as it dived into the sea.

A little cloud just rounds things out.

25*15s@80, Dwarf3, post in Snapseed and Google Photos.

An orange yellow comet tail in a blue purple sky, with hints of an out of focus sea below.
#astronomy#photography#astrophotography
Public
grobi

Comet G3 ATLAS over Uruguay
* Image Credit & Copyright: Mauricio Salazar
instagram.com/astropolo_/

Explanation:
Comets can be huge. When far from the Sun, a comet's size usually refers to its hard nucleus of ice and rock, which typically spans a few kilometers -- smaller than even a small moon. When nearing the Sun, however, this nucleus can eject dust and gas and leave a thin tail that can spread to an enormous length -- even greater than the distance between the Earth and the Sun. Pictured, C/2024 G3 (ATLAS) sports a tail of sunlight-reflecting dust and glowing gas that spans several times the apparent size of a full moon, appearing even larger on long duration camera images than to the unaided eye. The featured image shows impressive Comet ATLAS over trees and a grass field in Sierras de Mahoma, San Jose, Uruguay about a week ago. After being prominent in the sunset skies of Earth's southern hemisphere, Comet G3 ATLAS is now fading as it moves away from the Sun, making its impressive tails increasingly hard to see.
apod.nasa.gov/apod/ap241006.ht
en.wikipedia.org/wiki/C/2024_G
astronomy.swin.edu.au/cosmos/*

apod.nasa.gov/apod/ap151118.ht
cometcampaign.org/files/images
apod.nasa.gov/apod/ap240907.ht
apod.nasa.gov/apod/ap160202.ht

theskylive.com/c2024g3-info
esa.int/Science_Exploration/Sp

apod.nasa.gov/apod/ap250128.ht

2025 January 28 A foreground grass field is shown below a distant field of stars. On the grass field are some trees. Dwarfing the trees, in the sky, is a comet with a long tail. Please see the explanation for more detailed information. Comet G3 ATLAS over Uruguay * Image Credit & Copyright: Mauricio Salazar Explanation: Comets can be huge. When far from the Sun, a comet's size usually refers to its hard nucleus of ice and rock, which typically spans a few kilometers -- smaller than even a small moon. When nearing the Sun, however, this nucleus can eject dust and gas and leave a thin tail that can spread to an enormous length -- even greater than the distance between the Earth and the Sun. Pictured, C/2024 G3 (ATLAS) sports a tail of sunlight-reflecting dust and glowing gas that spans several times the apparent size of a full moon, appearing even larger on long duration camera images than to the unaided eye. The featured image shows impressive Comet ATLAS over trees and a grass field in Sierras de Mahoma, San Jose, Uruguay about a week ago. After being prominent in the sunset skies of Earth's southern hemisphere, Comet G3 ATLAS is now fading as it moves away from the Sun, making its impressive tails increasingly hard to see. Authors & editors: Robert Nemiroff (MTU) & Jerry Bonnell (UMCP) NASA Official: Amber Straughn Specific rights apply. NASA Web Privacy, Accessibility, Notices; A service of: ASD at NASA / GSFC, NASA Science Activation & Michigan Tech. U.
#space#comet#astrophotography
Public
ESO

A moving story behind a beautiful snapshot of #Comet C/2024 G3 ATLAS:

“We took the photograph while we were en route from northern #Chile to Santiago, travelling to attend the first workshop on Equity, Diversity, and Inclusion for the Chilean astronomical community at ESO-Vitacura. Little did we know that this journey would present us with a once-in-a-lifetime observational opportunity!

The flight was delayed, and as the plane ascended, the timing coincided perfectly with sunset. By pure coincidence, the window seat in our row was unoccupied, providing us an unobstructed view of the breathtaking landscape below. It was then that we noticed a faint but unmistakable glow in the sky: Comet C/2024 G3 Atlas!

Eager to share this spectacle, we informed the flight attendants, who promptly passed on the news to the pilots. They were as enthusiastic as us, and they made an announcement to the passengers, describing the rare sight visible outside the plane. The pilots dimmed the cabin lights and even turned off the wing lights to enhance visibility, allowing everyone onboard to experience the comet in its full glory.

The cabin was filled with awe as passengers took pictures of the comet. This moment was a testament to how celestial events can bring people together, even at 30,000 feet!”

🥲

Thanks for sharing this wonderful image and story, Virginia Cuomo from the Astronomy Department of La Serena University in Chile and the Chilean Astronomical Society, and Annagrazia Puglisi from the School of Physics and Astronomy of the University of Southampton!

📷 Annagrazia Puglisi

A view from an airplane window during twilight, showing the wing silhouetted against the sky. A comet –a white elongated smudge– hovers above the horizon, surrounded by scattered stars. Below, faint city lights dot the dark landscape.
#astrodon#astronomy#astrophotography
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