Outburst in action on☄️67P/C-G Short-lived outburst from 67P/Churyumov-Gerasimenko captured by Rosetta's OSIRIS narrow-angle📸29 July 2015. Image at⬅️taken 13:06 GMT&does not show any visible signs of jet. sci.esa.int/web/rosetta/...

Another Solar Eclipse for XRT Right before XRT celebrated 19y of observations, it observed another solar eclipse. The benefit of observing☀️from space is that we get more opportunities to see solar eclipses than would be possible from single ground based📍 xrt.cfa.harvard.edu/xpow/2025092...

🎄 Are your holiday decorations ready? Euclid has a cosmic garland to add: NGC 646. The large barred spiral galaxy appears close to a smaller galaxy to the left, but they’re actually about 45 million light-years apart 👉 https://www.esa.int/ESA_Multimedia/Images/2025/12/Euclid_s_galaxy_garland 🔭

Hubble Reveals Largest Found Chaotic Birthplace of Planets. Located roughly 1,000ly (9,5 quadrillion km) from Earth, IRAS 23077+6707, nicknamed “Dracula’s Chivito,” spans nearly 400bil mil (643bil km)—40 times the diameter of our solar system to outer edge of the Kuiper Belt of cometary bodies.

This cosmic butterfly is IRAS 23077+6707, the largest planet-forming disc seen around a young star yet!  Hubble has revealed it to be an unusually chaotic specimen, with wisps of material flying far beyond the disc 👉 https://esahubble.org/images/opo2606/ 🔭

🌖 This image shows the South pole of the Moon taken by the NASA's Lunar Reconnaissance Orbiter (LRO). It is the main candidate landing site for Artemis III. 🧪🔭 🔗 esa.int/Science_Exploration/Human_and_Robotic_Exploration/Orion/Artemis_III

HiPOD: In Search Of...a Recent Impact Site Context Camera data shows a dark blast zone in one image that was not present in an earlier picture. HiRISE is often requested to target such features to examine if the feature might be an impact crater. https://uahirise.org/hipod/ESP_075359_1730 #Mars

"Milky Way rising, photographed from Earth and space in collaboration with National Geographic's @babaktafreshi.bsky.social " (I don't know if this profile is the original here but is the one I found) Don Pettit x.com/astro_Pettit...

Hubble has snapped a seemingly close pair of galaxies, Arp 4 – but looks can be deceiving! Find out why here 👉 https://esahubble.org/images/potw2551a/ 🔭

📷 This NASA/ESA #Hubble Space Telescope image shows galaxies MCG-02-05-050a (left) and MCG-02-05-050, collectively called Arp 4. But this pairing is simply an unlikely visual coincidence... 🧪🔭 🔗 esahubble.org/images/potw2... @stsci.edu

NASA’s Jet Propulsion Laboratory: SPHEREx Observatory Completes First Cosmic Map Like No Other www.jpl.nasa.gov/news/nasas-s...

#OTD 12/22/2002 This view of Earth's Southern Hemisphere near the beginning of summer was created using images from the #Galileo 🛰️spacecraft taken during its Dec 1990 flyby Credit NASA/JPL www.jpl.nasa.gov/images/pia00...

An orbital sunrise with comet C/2023. Don Pettit x.com/astro_Pettit...

Filament eruption from the vicinity of region 4316 (SE of the sun). We can see some material lifting off. Maybe we'll see a CME later in coronagraphs. ☀️

Another attempt at imaging Ganymede, early morning on 20th. No surface markings visible - poor focus maybe. Ive shown a winjupos simulation for the same time. To be fair, there's not much variation in albedo, so maybe I was expecting too much 🔭

2/n This second image is quite unusual. The Mars Express viewing angle makes it look like Phobos is passing over Kasei Valles, but that region is actually farther north than Phobos’s orbit. Full size image 6K (much bigger than this): flic.kr/p/2rMVSWh 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 🧪🔭

NGC 4388 – NIRCam & MIRI (Webb) Processed by ahajesam www.reddit.com/r/jameswebb/... 5627 - Dust and Molecular Gas in Galactic Winds and Fountains: A JWST Survey of Nearby Highly Inclined Starburst and Active Disk Galaxies www.stsci.edu/jwst-program...

HiPOD: Dunes of the Southern Highlands This image displays the middle portion of a large dune field composed primarily of crescent-shaped “barchan” dunes. Here, the steep, sunlit side of the dune, called a slip face, indicates the down-wind side. More: https://uahirise.org/hipod/ESP_049371_1380

Time-lapse from ISS by Kimiya.Yui x.com/Astro_Kimiya...

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.

Today is the December solstice at 15:03 GMT/16:03 CET. This @eumetsat.int MTG‑I1 image from 19 December 2025, 06:00 GMT, shows Earth’s day–night terminator tilted near its annual maximum of about 23.5°.

Fragmented of☄K1 (ATLAS)–Webb With perihelion only 0.33 AU(49 mil km) from☀,☄was not expected to survive perihelion, but it did& was recovered 18 Oct 2025.As of mid-Dec 2025,☄is around apparent mag 14,&can be seen in the constellation of Camelopardalis en.wikipedia.org/wiki/C/2025_... (alt info)

The #galaxy NGC 4388 with #JWST MIRI. 🔭 commons.wikimedia.org/wiki/File:NG...

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.

Aurora from the flight deck 📸 Matt Melnyk December 20, 2025 Baffin Island / Greenland spaceweathergallery2.com/indiv_upload...

"There is a pretty sizable positive polarity coronal hole crossing the central meridian. We should begin feeling the CIR tomorrow& fast solar wind stream on Dec 22nd. The SWPC has issued a G1 storm watch for December 22nd and 23rd." Jure Atanackov x.com/JAtanackov/s... Video from helioviewer

Eruptive M1.0 solar flare from a small new unnumbered region in the NE of the sun. Type II radio emissions detected, estimated speed 558 km/s ☞ We have to wait and see whether it has any earth-directed components ☀️

"Here's a view looking over the limb of Enceladus with Saturn in the background, made from images captured with Cassini's narrow-angle camera on Dec 19, 2015 #OTD from a distance of about 25,000 km (15,534 miles)" Jason Major x.com/JPMajor/stat... Raw data solarsystem.nasa.gov/raw_images/3...

Don Pettit: "I view my star trail photography as part science&art. We use our 📸 on ISS for space observation, here showing atmospheric airglow, streaking city lights, and arcing stars about our pitch axis. But the byproduct can make a surreal beauty unlike anything else on🌎." x.com/astro_Pettit...

🐣 Found: newborn stars and planets #ESAGaia & ALMA joined forces to study 31 baby star systems, finding hints of planets 👉 www.esa.int/ESA_Multimed... The collage also shows our own Solar System for reference on the bottom right, as it is predicted to have looked at an age of 1 million years. 🔭 🧪

2025 Geminid meteor, Gemini, and Jupiter Taken by Bum-Suk Yeom December 15, 2025 Yecheon, South Korea spaceweathergallery2.com/indiv_upload...

"Sand grains with central holes, sol 1705. Electric origin or corals or what else?" 6.12.25 Perseverance rover(first image) HolgerIsenberg on Reddit www.reddit.com/r/Perseveran... Raw data mars.nasa.gov/mars2020/mul...

Here's a view of the largest boulder on the near-Earth asteroid Bennu imaged by OSIRISREX on March 29, 2019. Includes a Buzz Aldrin (ca. Apollo 11) added for approximate scale Jason Major x.com/JPMajor/stat... www.asteroidmission.org/20190329-ben...

Asteroid Bennu Full Rotation Series of images by OSIRIS-REx,shows asteroid Bennu in 1 full rotation from 50mil(80 km).Spacecraft’s Poly📸obtained thirty-six 2.2-millisecond frames over period of 4h&18m Credit NASA's Goddard Space Flight Center/University of Arizona science.nasa.gov/resource/ast...

Zoomable version🔎 esawebb.org/images/potm2...

Cold Moon in a Small Town 📸 Nancy Rice The "Cold Moon" rising over a home in a rural town in northeast New Mexico, USA. 📸: Fujifilm X-T5 Lens: Tamron 18-300 mm Settings: ISO 200, f/6.3, 1/450s, 300 mm, EV -0.7 www.flickr.com/photos/20094...

Saturn's 84-km-wide moon Pandora, imaged with Cassini 9 years ago today, December 18, 2016 in IR, green, and UV wavelengths from a distance of about 35,400 km. Credit: NASA/JPL-Caltech/SSI/Cassini Imaging Team/Jason Major Jason Major x.com/JPMajor/stat...

ALMA and NSF VLA Reveal Time-Stamped History of Star Birth in a Dazzling Cosmic Jet Decades of NSF VLA groundwork enable ALMA’s breakthrough images, uncovering rings in stellar jet that record explosive outbursts from young⭐ www.almaobservatory.org/en/press-rel... www.nature.com/articles/s41...

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.  🔭 🧪

Mars&Venus Converging Near☀️ 'Are u looking for Mars or Venus? Don't! U will hurt your👁️. 2 planets are very close to☀️, converging for double solar conjunction. This coronagraph image from SOHO shows the 2 worlds Dec.17, w Mars front of⭐cluster NGC 6530 at same time' spaceweather.com/archive.php?...

Europa Clipper has observed interstellar comet 3I/ATLAS with its ultraviolet spectrograph instrument! News here: www.swri.org/newsroom/pre...

NASA IXPE’s Longest Observation Solves Black Hole Jets Mystery International team of astronomers using IXPE has identified origin of X-rays in supermassive black hole’s jet, answering question has been unresolved since earliest days of X-ray astronomy arxiv.org/pdf/2505.01832

XMM-Newton sees☄️3I/ATLAS in X-ray light ESA’s X-ray space observatory XMM-Newton observed interstellar☄️3I/ATLAS on 3 Dec for around 20h. During that time,☄️was about 282–285mil km from spacecraft XMM-Newton observed☄️with its EPIC-pn 📸, its most sensitive X-ray 📸 More www.esa.int/ESA_Multimed...

Large filament lift-off on the sun's far side

HiPOD: Deep in Valles Marineris Here we see a section of a crater that exposes light toned layered sediments in the wall, which are fractured and faulted, perhaps as a result of the impact. More: https://uahirise.org/ESP_089134_1655 NASA/JPL-Caltech/University of Arizona #Mars #science #NASA

Paul Smith: "Last month, I caught one of the most intense red sprite events in sky over Texas. This is a full-frame&close-up view of 40-something-mile-tall behemoth. Last image in set is interpretation of how this would have appeared to naked👁️if viewed directly" www.facebook.com/paulmsmithph...

The luminous red #nova (LRN) AT2025abao in the Andromeda #galaxy was discovered by Koichi Itagaki on 10/17/25. Here is M31 on 6/25 vs 11/14 this year imaged with a #Dwarf3 telescope. The lower right inset shows the bright nova after the merger of two stars. #astronomy #astrophotography

Haven't seen a lot of posts about the Luminous Red Nova AT2025abao in M31 on here, so I thought I give it a try and 2 days ago weather cleared up just long enough to get a bit of #Astrophotography data. I was really surprised that it was visible even in single subs.