Check out the new trailer for @esa.int's proposed Ramses mission! 🍿📽️ Ramses would escort the cruise-ship-sized asteroid Apophis through its safe but exceptionally rare flyby of Earth in 2029: www.esa.int/ESA_Multimed...

ESA's RAMSES mission is funded ! We are going to visit asteroid Apophis in 2029 :D www.esa.int/About_Us/Cor... #planetaryscience

3I has been a thought-provoking practice run in a number of ways... How exciting would it be if we get to point CoCa at an ISO!

Piped sounds of the bush do not, in fact, improve the ambience of a hospital, since it just seems to accentuate the wistfulness of being somewhere other then a hospital

A very close view of the craters that cover the surface of Saturn’s icy moon Rhea. NASA’s Cassini mission made this flyby in January 2011, passing within 76 kilometers (47 miles) at a speed of 8 km/sec (18,000 mph). This image had a resolution up to 22.6 meters per pixel towards the closer terrain.

The carnations are coming in 🌱🇳🇿

🔭 3I/ATLAS: A View from Planet Earth Image Credit & Copyright: Rolando Ligustri apod.nasa.gov/apod/ap25112...

HiRISE Image of Exocomet 3I/ATLAS! On 2 October 2025, MRO turned away from Mars to image 3I/ATLAS, only the third interstellar object ever observed passing through our solar system! https://www.uahirise.org/releases/3i-atlas/

Here are the #I/ATLAS releases from varied NASA/ESA missions. Having worked with such telescope & spacecraft data for 40 years, my perspective is: no surprises. It's a comet; its differences from Solar System comets are intriguing but every comet is different! science.nasa.gov/solar-system...

Remember that lovely aurora last week? Well...um...this is what Euclid saw... 😱 🧵

huge news for all of you comet composition nerds out there: according to this new ATel by Ganesh et al., C/2025 K1 (ATLAS) is another NH2-dominated comet like Machholz (!) or Yanaka (!!)

Summer is a' coming in. The pollinators are delighted #bloomscrolling 🌱🇳🇿

3 years ago, NASA crashed the DART spacecraft into an asteroid at 22,000 kilometers per hour. The event changed the asteroid's orbit and tilt & sent it tumbling. A nearby cubesat captured these remarkable images of the asteroid immediately after the impact. 🧪🔭 aasnova.org/2025/11/03/s...

It is a very interesting dot. "NASA to Share Comet 3I/ATLAS Images From Spacecraft, Telescopes" www.nasa.gov/news-release... (Again, raw images of 3I from NASA spaceccraft have been available - these are the processed images with expert commentary.)

And here's the real downer... AST SpaceMobile plans to launch a few hundred satellites that are as bright as Saturn when sunlit. So. A lot more research images will look like this in the near future. Thanks, direct-to-cell gigantic satellites.

#OPAG - #3I/ATLAS Observations from Europa Clipper, Executed a calibration for the UVS Instrument.

Now that the US gov is open, 3I/ATLAS images from the Mars-orbiting HiRISE camera will soon be out. My money is on them looking just like regular cometary images. If that disappoints you, scan the HiRISE catalog for spectacular Mars images like this one uahirise.org/catalog/

Indeed, two decades ago now

3I/ATLAS is the first interstellar object bright enough for amateurs to image: so fabulous to see the delight ☄️😍

Great to see this 3I/ATLAS data now through. A CaSSIS-descendant camera flies on Comet Interceptor, so great practice! Clarification: it's not the first comet data measured from Mars (cf. comet Siding Spring in 2014)

From @noirlabastro.bsky.social: Comet C/2024 G3 (ATLAS) gleams against the January sky above three NOIRLab-supported telescopes in this image. The last time it was visible from Earth was about 600,000 years ago. #astronomy CTIO/NOIRLab/NSF/AURA/C. Corco

We have upgraded our geomagnetic forecast today (12 November 2025) to the highest intensity level amid an ongoing solar storm. Current predictions suggest that the activity will result in potentially the largest solar storm to hit our planet in over two decades.

JWST's recent Cycle 5 call garnered 2,935 proposals (requests to use this amazing telescope and its data 🔭), breaking the record that it set last year! The proposals represent 7,509 unique investigators over a range of career stages, and come from institutions in 59 countries and 47 U.S. states!

Camera facing the right direction but it’s so big #Aurora Australis, South otago NZ

Deeply happy to have been asked to give a plenary at the 15th Asteroids Comets Meteors conference next year, on 'Interstellar visitors: An overview of observational and theoretical studies with emphasis on 3I/ATLAS'.

I like how this G4 solar storm, which has no expected effect on electricity supply to consumers, comes the week after NEMA did the first full practice exercise for a (100x more severe, for the exercise) solar storm www.stuff.co.nz/nz-news/3608...

Grid emergency notice sparked by solar storm

Getting closer to this year's Xmas cake. Originally inspired by @beefaerie.bsky.social, the recipe is noted & amended each year. Tweaks from places I've lived: cranberries instead of glace cherries, maple syrup for some treacle, wattle seed in the spices.

Aurora borealis from Longmont, Colorado.

For Earth-based observers, bright sky background around full Moon, and geometry where comet 3I/ATLAS is close on the sky to the Sun, means it's taking a few days for big optical telescopes to get back on the job. All very standard, it's what happens for moving objects.

Hey look it's a @vrubinobs.bsky.social difference imaging zooniverse game! Help us classify real vs bogus detections with REAL RUBIN DATA! www.zooniverse.org/projects/ebe...

Interstellar comet 3I/ATLAS was born with different and more ancient chemistry, has been more irradiated, and is speeding toward the Sun faster compared to Solar System comets. It's got a unique personality. But since literally Day 1 it was recognized as a comet and has only ever done comety things.

This is particularly sad as Lowell has long been a centre for Solar System planetary astronomy, a rare field internationally 🔭

If you don’t do research you’re not an observatory, you’re a tourist attraction. Solidarity to the excellent astronomers at Lowell.

Looking to start a PhD in Physics & Astronomy in 2026? The team @physicsuol.bsky.social have announced their STFC-funded projects on offer next year, spanning astrophysics, planetary science, and space instrumentation. Deadline: Jan 18th, contact us to learn more! le.ac.uk/study/resear...

First of the cornflowers, last of the freesias. Orlaya is a drifting sea of umbels. #bloomscrolling First flower vase I've had a chance to pick in quite a while 🌱🇳🇿

Delighted to be working with @rjme.bsky.social and the Auckland folks on this major Marsden Council project, which supports our @vrubinobs.bsky.social involvement

Open consultation & pitch process with the NZ space community. Open consultation & pitch process with the NZ space community. Expert review of proposals. If I say this enough, it'll happen, right?

The transverse term A2 is (3.75+-1.59)e-7 au/day2 (2.4sigma). i.e. negligible. These are *not* “unprecedented, *not* unexpected, I’m unaware of any scientist friends who are “bewildered”. Still a comet, albeit an interesting one whose properties may tell us something about other systems. #3IATLAS

Updated Comet 3I/ATLAS #3IATLAS orbit dropped from JPL Small-Body Database, including measured positions thru Nov 4. ssd.jpl.nasa.gov/tools/sbdb_l... The “non-gravitational” acceleration terms in the orbit are *barely statistically significant*…the radial term A1 is (1.11+-0.30)e-7 au/day2 (3.7sig)

Season of the rhodo continues

Academics in Assyria in the 7th c BC complain that admin is preventing them from doing research and teaching

I recommend this article by @meghanbartels.bsky.social and @leebillings.bsky.social for folks who are looking for *factual* information about why 3I/ATLAS is of interest to planetary astronomers: www.scientificamerican.com/article/the-...

Let me say this in plain English: a comet can just be a comet

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 🔭🧪

Interstellar comet 3I/ATLAS returns to (very carefully done) ground-based view

A personal reflection on the destructive erosion of ethics, norms and respect for law at NASA: 🧪🔭 🧵

@taramcallister.bsky.social YAY

Comet 3I Atlas from Level 0 data on 29-October from clear filter images on WFI3 from PUNCH. Its in there... it is very clear in the stack of these images.

Interstellar comet 3I Atlas from all clear filter data from PUNCH's WFI3 satellite on October 29th. This is the combination of 134 separate images. It's again visible in single frames (moving coming next). Probably visual magnitude ~9.5ish.