Moving clouds slowly reveal sea ice twisting and turning hypnotically off the east coast of Greenland.

The Hektoria Glacier on the Antarctic Peninsula retreated by at least 8 km in two months, a rate nearly 10 times faster than previously measured for a grounded glacier, according to a study in Nature Geoscience. go.nature.com/4nETBYJ ⚒️ 🧪

🚀 Ready to launch your career into space? ESA Student Internships 2026 are now open! www.esa.int/About_Us/Car... #ESArecruits

👨‍🚀 For over 25 years now, there has always been someone in space, orbiting our planet every 90 minutes aboard the International Space Station 🛰️. Now you can relive every day of this incredible journey thanks to Ben Feist and David Charney 🔗 issinrealtime.org

Open Sesame! The ELT doors have moved for the first time. This was no small feat, as each door will weigh 650 tonnes once completed. The ELT dome & its doors will guard the telescope from the harsh conditions of the Atacama Desert. https://www.eso.org/public/videos/potw2544a/ 🔭 🧪 📹 ESO/ACe

THREAD: 25 years ago today, the first crew of the International Space Station for a four-and-a-half month stay. Two cosmonauts - Yuri Gidzenko and Sergei Krikalev - were joined by NASA astronaut William Shepherd. Since that moment, the ISS had had at least two people onboard.

Comet A6 Lemmon's closest approach to the Sun is on November 8th, 2025. I took this image on October 29th showing a huge increase in activity around the core. A very zoomed in shot using a 16 inch telescope f/18, 7400mm focal length with Canon R6. #astrophotography #astronomy #comets #cometlemmon

1/3 You might’ve seen last week’s newly released JWST data of Planetary Nebula NGC2440, here’s my take on it 😵 Full size 4K image and more info in this thread 🧵 🔭🧪 Credit: NASA/ESA/CSA/STScI/j. Roger/Andrea Luck CC BY

Live in the Northern Hemisphere and want to see a comet older then the Solar System? Nice overview of upcoming pre-dawn visibility for interstellar comet 3I/ATLAS with small amateur telescopes 🔭🧪

And my final #sciart pumpkin (also my most viral post ever) Jupiter in IR

James #Webb Space Telescope #JWST Tracing Binary Star Metamorphosis: Chandra+JWST Imaging of Bipolar Planetary Nebulae TARG: #NGC2440 2024-10-30 PI: Kastner, Joel H. NIRCAM f405n-f444w f356w f212n f150w2-f164n yuval-harpaz.github.io/astro/jwst_l... NASA/ESA/CSA/STScI/j. Roger

Comet C/2025 R2 Swan on October 24th. This is processed from 14.5 minutes of integration across 28 images in PixInsight and Photoshop. flic.kr/p/2rCpsHF

🦇 Astronomy Picture of the Day Lynds Dark Nebula 43, a.k.a. the Cosmic Bat nebula Credit: Team Ciel Austral www.cielaustral.com www.star.ucl.ac.uk/~apod/apod/a... #APOD 🧪🔭

Another tidbit in our new #Melissa story: the government shutdown means that federal researchers weren't gathering the usual science data during hurricane-hunter flights, because only mission-critical data were allowed. And those who did fly aren't getting paid. 🧪 www.nature.com/articles/d41...

Alrighty, ready to see something really cool? (and maybe a little nauseating) The evolution of Hurricane Melissa's mesovortices at peak strength.

How can you not love these phenomena? #TLEs #Red #Sprites youtu.be/RzGKWZ5CR9g?...

🔭 JWST Program 6882 - Vast Exploration for Nascent, Unexplored Sources (VENUS): www.stsci.edu/jwst-program... data: SMACSJ2131-4019, released: 2025-10-29 NASA, ESA, CSA, STSci/ #JWST NIRCam 444, 356, 200

Two meteors overnight left notable persistent ion trains. Crestone, Colorado USA October 28-29, 2025 #astronomy #astrophotography

At this point, publications that platform Loeb's comments, or feature him as the story lede (i.e., "Harvard Astronomer says....") deserve to be ridiculed and not taken seriously. If you choose to look away from the hugely negative impact is having for the sake of clicks, then that's on you.

Hurricane #Melissa update: imagery from dawn until about 2:00 pm local time, when the eye was squarely over Jamaica. At landfall sustained winds were about 185 mph, making Melissa one of the strongest hurricanes ever.

C/2025 A6 (Lemmon) from last night. It is a really good telescopic target right now! Lots more detail throughout the tail but especially close to the coma with streamers fanning out inside the dust tail. Interesting to see the turquoise coma breezing off to the right a bit too. #astrophotography

Aurora over Raisting Earth Station - From Simeon Schmauß (stim3on.bsky.social) - https://flic.kr/p/2pQvMzn

Michael Jäger does Michael Jäger things: C/2025 A6 (Lemmon) on Oct 26. forum.vdsastro.de/viewtopic.ph... which also has an animation. 🔭☄️

INTERNATIONAL #ROSETTA MISSION Target: 67P/CHURYUMOV-GERASIMENKO 1 (1969 R1) Date: 12 aug 2015 21:21:11 utc Distance to Target: 329 km Camera: OSINAC Orange filter rosetta-osiris.eu/image/NAC_20... ESA/Rosetta/MPS for OSIRIS Team MPS/UPD/LAM/IAA/SSO/INTA/UPM/DASP/IDA/j. Roger

From the makers of the Apollo in Real Time websites comes a new experience with 500 times more data. ISS in Real Time offers the chance to explore more than 9,000 days of photos, video and audio transmitted during the 25 years of continuous human residency on the International Space Station.

From a crewmember on yesterday's Teal 74 mission into now-Category 5 Hurricane #Melissa. As clear of an eye as you will see in the Atlantic basin.

In the past quarter-century we’ve transformed large swaths of the Earth’s surface. Here’s a handful of high-res Planet satellite images (all at the same scale) showing the imprint of coal on the landscape, from mine to power plant. From: medium.com/planet-stori...

Announcing ISS in Real Time, a new multimedia project where you can play back every day of the past 25 years aboard the International Space Station. issinrealtime.org

MISSION NEW #HORIZONS Target: #PLUTO #CHARON Start Time: 2015-07-13 T 21:08:30.007 MVIC Nir Red Blue filters opus.pds-rings.seti.org/opus/#/instr... NASA/JPL/j.Roger

C/2025 A6 (Lemmon) over the historic Lobato bridge in southern Colorado last night www.coloradocentralmagazine.com/the-lobato-b... #astronomy #astrophotography

AstroBin's Image of the Day: "Apparent Angle Evolution of the Comet’s Ion Tail (C/2025 A6 (Lemmon))" by Julien De Winter and Victor www.astrobin.com/l7210y/ #astrophotography

Krasheninnikov volcano in Kamchatka. Image taken today by Sentinel-2.

Best images of Comet Lemmon taken from the Autumn 2025 Kielder Star Camp using my Seestar S50. Looking forward to processing the raw subs properly when we get home!

My attempt at Comet A6 Lemmon from subpar conditions last night. Wispy clouds still visible in the final image. Was surprisingly bright, p sure I could see it with the unaided eye! Easy through binocs. Canon R5, RF100mm f2.8 19 images, ISO 800, 30s f3.2 🔭 #astronomy #comet

Very cool research 🧪⚒️ www.sciencealert.com/experiment-r...

Managed to grab a few more images of Comet Lemmon this evening (Sunday Oct 26th) from Kielder Campsite, Northumberland, through very brief gaps in the clouds. This is a phone-processed stack of half a dozen jpg images taken with my Seestar S50.

🔭 Two Tails of Comet Lemmon Image Credit: Massimo Penna star.ucl.ac.uk/~apod/apod/a...

Comet C/2025 A6 Lemmon, 48.5 minutes of exposure across 97 images taken from Bear Divide in Los Angeles. This is the first time I’ve processed a comet observation like this so I had to do some quick learning and experimentation. Hopefully I’ll improve on this in the future. flic.kr/p/2rBGQZv

LDN 1165 captured on two nights a couple of weeks ago 😊🔭 This was shot on the EdgeHD 8 with Hyperstar for a total integration time of 7 hours in OSC and Mono. I used the mono Ha data to enhance the red and the luminance details. #Astrophotography @kat-astro-bot.bsky.social‬ what do you see?

Fresh JWST view of Uranus taken Oct 6 2025 with NIRCam. Full size & more info: flic.kr/p/2rByidu 🔭🧪 Credit: NASA/ESA/CSA/STScI/Andrea Luck CC BY Proposal PI: Varun Bajaj Proposal ID: 8975 Filters: F150W2-F162M, F410M

#Comet C/2025 A6 #Lemmon in the constellation Boötes, on the evening of October 24th. Captured from the light polluted outskirts of Munich. 16 minutes integration time with my Fujifilm X-S10 and 135mm f4.5 lens (untracked). #astrophotography 🔭

While it has already been a few weeks that #3I/Atlas flew by Mars, here is a very good writeup (in Italian) about the observations made by the #Perseverance rover that caused a lot of confusion in the news. 🔭 www.coelum.com/news/news-da...

#Comet C/2025 A6 #Lemmon in the constellation Boötes, on the evening of October 24th. Captured from the light polluted outskirts of Munich. 16 minutes integration time with my Fujifilm X-S10 and 135mm f4.5 lens (untracked). #astrophotography 🔭

Comet C/2025 A6 Lemmon on october 24th from Valberg in the French Alps. 19h00 UTC Sony A7III and 85mm Lens F1.8 Sky 30x30 seconds Foreground 8x30 seconds @astropierre.com #astrophotography

Ya va tomando forma, perijovio 70. Juno Mission JIR/JIRAM #Io

🔭 Webb's Rho Ophiuchi Image Credit: NASA, ESA, CSA, STScI, Klaus Pontoppidan (STScI), www.star.ucl.ac.uk/~apod/apod/a...

I've read about ZTF SLRN-2020 event where a star basically ate it's own planet. So I decided to try and depict this from a planet's perspective. It's atmosphere evaporating and getting ripped away by the star. #SciArt #spaceart #astronomy

Comet A6 Lemmon from Valberg in the French Alps on oct 23rd. 30x30sec exposure Sony A7III samyang 24mm f2.8 #astrophotography #comet

uv makes installing and using Python *so* easy! It works on pretty much any computer and it's lightning fast. 🔭☄️ #astrocode If you're still using conda, pyenv, or... basically any other tool, then I can *highly* recommend switching:

ESA’s Jupiter Icy Moons Explorer (Juice) spacecraft is ready to aim its instruments at interstellar comet 3I/ATLAS! 🪐☄️ Here’s what’s happening and why it’s such a rare opportunity 🧵