This is hands down my favourite #SolarFlare in recent years, an event from September 2024. The flare persisted for several hours, giving us a jaw-dropping view of ‘coronal rain’ (seen in the yellow structure) and ‘supra-arcade downflows’ (seen in the cyan structure). A beauty!

I gripe a little bit about the ambiguity of the word "day" — astronomically speaking, of course — and also present you with a *gorgeous* Hubble shot of a face-spiral galaxy that turns out to be part of the puzzle that tells us how the universe expands. badastronomy.beehiiv.com/p/happy-sols... 🔭 🧪

Happy holidays from Stony Ridge Observatory! #Astrophotography 🔭 🧪

3/n Not sure if anyone noticed already, but the one in the first photo near Pavonis Mons looks like a massive dust storm. Full resolution 300MP(!) & info on: flic.kr/p/2rMW4so Credit: ESA/DLR/FUBerlin/AndreaLuck CC BY 🧪🔭

1/n 2 NEW epic images of Phobos over Mars just released by @esa.int Mars Express This view is especially striking, with Phobos between the Tharsis volcanoes and Noctis Labyrinthus–Valles Marineris Full resolution 300MP(!) & info on: flic.kr/p/2rMW4so Credit: ESA/DLR/FUBerlin/AndreaLuck CC BY 🧪🔭

2nd semi-final of ✨ #planetaryScience image of 2025✨ This round features Earth vs. Comets 🧪⚛️ 🗳️ Voting ends on Wednesday, Dec. 24, at 3 p.m. UTC/4 p.m. CET/10 a.m. EST/7 a.m. PST/midnight JST. Here are the two semi-finalists 🔽

57 years ago today - December 21, 1968. Apollo 8. The very first photograph of the whole Earth taken by one of us 🌎 If all goes to plan, in the next few months, the first such photograph in over half a century will be taken, on Artemis II.

HH 30 - From Judy Schmidt (geckzilla.bsky.social) - https://flic.kr/p/bD4USy

This is the silhouette of 1,122-km-wide Dione in front of Saturn—a view captured with Cassini 15 years ago on December 20, 2010. Synthesized color from a single clear-filter greyscale image.

Martian moon Phobos from Mars Express' HRSC camera. A color composite of three images taken through ND, GRN, and BL filters. Largest crater with bright splotches is Stickney. North is up. Date: September 19, 2025. Credit: ESA\DLR\FU Berlin\D. Machacek.

From Dr. Sebastian Voltmer @SeVoSpace www.instagram.com/sebastianvol... 3I/ATLAS with its two tails, captured during its closest approach to Earth. In the distant background, galaxies in the constellation Leo are visible.

I might be biased, but today the South Polar Cap of Mars looks a lot like Scotland to me 😂 Full size image & info: flic.kr/p/2oqrPg1 🔭🧪 Credit: ESA/DLR/FUBerlin/AndreaLuck ESA Mars Express HRSC 2015-04-09

In a historical milestone, Hubble has witnessed the catastrophic collision of asteroids in the nearby Fomalhaut planetary system 🪨💥  Observations also revealed that an object previously suspected to be a candidate planet was, in fact, a dust cloud.  🔭 🧪

I wanted to do a quick thread about this paper led by a great postdoc here at JPL, Flavio Petricca, which suggests that Titan may not have a global ocean after all. www.nasa.gov/solar-system...

Europe's nighttime glow from space 🌍 This first colour mosaic of the continent at night was created from 7000+ pictures taken by astronauts on the International Space Station. www.esa.int/ESA_Multimed...

Superb video included in today's JPL update for #PerseveranceRover (www.jpl.nasa.gov/news/nasas-p...). With synthetic frames and obviously, the rover doesn't move that fast, but the final result is impressive. Credit: NASA/JPL-Caltech

Orographic cloud #Mars #Express Orbiter Visual Monitoring Camera #VMC - The Mars #Webcam 2024-05-31 MEX MARS VMC CALIBRATED DATA EXT9 V1.0 PRODUCER: ELENI RAVANIS AND JORGE HERNANDEZ-BERNAL psa.esa.int/psa/#/pages/... ESA - European Space Agency, / j. Roger

1/3 Here is one of several flyovers our digital terrain model group created from a DTM of our 100,000th observation of Mars!

On FB, Yukon Geological Survey posted some spectacular photos of landslides & snow avalanches triggered by the magnitude 7.0 earthquake on Dec 6 in the St Elias Mountains. Here are some of my favs. @geocron.bsky.social @theronfinley.bsky.social @davepetley.bsky.social @ksvenenvig.bsky.social 🧪⚒️

'73 Minutes' Expedition 73 day / night / day transition in real time... 4,411 images from a time-lapse sequence photographed by Jonny Kim are repaired, remastered & retimed to create 4k UHD real time video footage. Credit: Jonny Kim / ISS / NASA / ESRS / Seán Doran youtu.be/OJ46X9a0NL8

TODAY! 60th ANNIVERSARY of the world's first rendezvous in space! 🚀 Gemini VI-A and VII Human spaceFLIGHT? - Gemini is where it all began... Photos, incl Jim Lovell seen through the window of GT-7 from #GeminiAndMercuryRemastered

One can never have enough Selfies from Mars! This one from Perseverance Rover was acquired on December 12, 2025 (Sol 1711) using the SHERLOC WATSON camera. Credits: NASA/JPL-Caltech #perseverance #marsrover #m2020 #nasa #science #space #exploration #solarocks #mars #selfie #jpl #SHERLOC #watson

There are still 24h left to vote for one of these four images in the 3rd quarter-final. The vote can be found in this thread: bsky.app/profile/spac... #scicomm #planetSci

My version of the latest Saturn and Triton release by JWST Full size & more info: flic.kr/p/2rLJqnZ 🔭🧪 Credit: NASA/ESA/CSA/STScI/AndreaLuck JWST/NIRCAM F150W2-F164N, F212N 2024-11-29 Proposal PI: Macarena Garcia Marin Proposal ID 9219

'The Emerald Sea' 4,427 images from 3 sequences by Don Pettit are remastered & retimed to create this stunning 10m54s 4k UHD video with music by Chris Zabriskie. Experience on a large screen if you can, its worth it. Credit: Don Pettit / ISS / NASA / ESRS / Seán Doran youtu.be/bEWAHP31UGc

Io, Europa and Jupiter - PJ58 - true colors - From Simeon Schmauß (stim3on.bsky.social) - https://flic.kr/p/2px9JTG

'Around The World In A Day' 4,411 images from a time-lapse sequence photographed by Jonny Kim are repaired, remastered & retimed to create 3x real time 4k UHD video footage with music by Stellardrone. Credit: Jonny Kim / ISS / NASA / ESRS / Seán Doran youtu.be/kgSCynekKJ8?...

Did you know that lightning can also go up into the sky? Here is one example of this seen from the ISS in Earth orbit. More here: en.wikipedia.org/wiki/Upper-a... This image is also up for the planetary science image of 2026: bsky.app/profile/spac... Credit: ISS, @stim3on.bsky.social #SciComm 🧪

Tomorrow...✨ sciencesocks.co/pages/amy-ra...

For Day 9 #ArtAdventCalendar evening. Some anamorphic chalk art of the Mars Curiosity rover (the 3d doesn't translate as well in an image) It's about 30 feet long #sciart

Time to vote 🔭🧪 🔽 The voting can be found after the fourth image. Just click on the image title there!

'Head Over Heels' ISS performing a flip maneuver. 6,179 images from 2 time-lapse sequences photographed by Kimiya Yui are repaired & remastered to create this 4k UHD video footage. Credit: Kimiya Yui / ISS / NASA / ESRS / Seán Doran youtu.be/ihtJl0JQaPY

I think this is the first time I've seen a day-night timelapse from the ISS and it's magical! 🌅🔭 A sunrise is notoriously difficult to timelapse from Earth, let alone from the ISS, where it happens orders of magnitude faster. Great setup by Jonny Kim and fantastic processing by Seán!

This is sorta the good news/bad news but really good news kinda thing: The Roman Space Telescope has completed construction (yay!) and astronomers have now discovered more than 40,000 near-Earth asteroids (yikes?) but it's good to know where they are. badastronomy.beehiiv.com/p/roman-spac... 🔭 🧪

Tried something new. I used WinJUPOS to de-rotate the #JWST #Saturn 🪐 images. Filters (F150W2, F164N) and F212N. Makes the storms and other features better visible.🔭 #astronomy Observation date: 2024-11-29

Today in 1989, the Space Shuttle Atlantis launched the Galileo spacecraft, the first orbiter and entry probe at a giant planet. When I watch it recede from the shuttle, I can't help but want to scream to open the antenna first (it never opened). They were still able to salvage an amazing mission.

Have you ever wondered what you would find if you could keep your eyes on a bee for more than a few meters? Us, too! preprint (with videos!) + thread 🧵 Precise, individualized foraging flights in honey #bees 🐝 revealed by multicopter drone-based tracking www.biorxiv.org/content/10.6... 1/9

1st quarter-final of ✨ #planetaryScience image of 2025✨ This round features Mars 🧪⚛️ 🗳️ Voting ends on Monday, Dec. 9, at 3 p.m. UTC/4 p.m. CET/10 a.m. EST/7 a.m. PST/midnight JST. Here are the four quarter finalists 🔽

Perseverance landing Descent Stage Downlook Camera - From Simeon Schmauß (stim3on.bsky.social) - https://flic.kr/p/2qMuEkG

'Lost World' 1008 frames of Himawari-8 satellite data are repaired, processed, graded & interpolated to create the film, with music by Chris Zabriskie. Missing frames are created to provide complete coverage and smooth timing. Credit: Himawari / JAXA / JMA / NICT / Seán Doran youtu.be/b4B2JGfU_jc

'Moonlight Aurora' 1,600 images from a time-lapse sequence photographed by Don Pettit are repaired, remastered and retimed to create this 3x real time video footage, with music by Stellardrone. Credit: Don Pettit / ISS / NASA / ESRS / Seán Doran youtu.be/5FYcJSGlb0k

NASA has completed the construction of #NASARoman! Last month, technicians joined the inner and outer portions of the observatory in Maryland. After final testing, Roman will move to the launch site at the Kennedy Space Center for launch preparations in summer 2026: https://go.nasa.gov/48EqnE8 🔭 🧪

Hubble reobserved interstellar comet 3I/ATLAS on November 30. At the time, the comet was about 178 million miles (286 million kilometers) from Earth. Hubble tracked the comet as it moved across the sky. As a result, background stars appear as streaks of light: https://go.nasa.gov/4iCU2lH 🔭 🧪

The first image of #3IAtlas from ESA's JUICE mission is in! I reprocessed the image to remove hot pixels (left) and the stars (right) to make the tail easier to see. Credit: ESA/Juice/NavCam Processing: Simeon Schmauß

What the heck, there's still a couple hours left in the day to share some more #BirdOfTheDay photos. Here's a few #LookingAtYou images to add to my Yellow Warbler shot from earlier today. #birds #photography

Short article is now out covering our field work in Death Valley National Park and the Mojave Desert earlier this summer! We’re testing new tech and software for future Mars helicopters and aerial vehicles. Photo by me. www.nasa.gov/solar-system... #planetaryscience #nasa #nps #photography

#ArtAdventCalendar #SciArt #blender Another Martian dawn/dusk scene. Same blue sunset, but with Perseverance taking some of the glory. Repost if you like this. Thank you.

An enormous “brown barge” system in Jupiter’s northern hemisphere. Processed using data from the 18th science pass of NASA’s Juno spacecraft. flic.kr/p/2jCNPtU

⚠️ Last call: Anyone who wants to suggest their favourite planetary science image of the year, you have until tomorrow evening (Dec. 1st). @jackiebranc.site, @kevinmgill.bsky.social, @stim3on.bsky.social, @andrealuck.bsky.social, @landru79.bsky.social do you have a favourite image from this year?

3/3 Time to update the Gas Giant Portrait I created, now including the new versions of Saturn and Uranus I recently processed. Full size & more info: flic.kr/p/2oUkYSY 🔭🧪 Credit: NASA/ESA/CSA/STScI/AndreaLuck Jupiter is next on the list to be updated :)