Hey planetary scientists! I don’t know about y’all, but ADS makes my life so much easier.

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

Nostalgia isn't what it used to be.

The Chinese found meteoritic dust on the far side of the moon and its composition argues that more water-rich asteroids may have hit the Earth early on than previously expected. Cool! I'm not an expert, but it seems to warrant more lunar far side sampling. #planetsci 🧪 phys.org/news/2025-10...

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

I continue to hold that the entire premise underlying all of these metrics is extremely flawed, and that what it all comes down to is unimaginative managers who are content to offload scientist performance reviews to publishing companies, resulting in a perverse incentive structure. 🧵

Yesterday we released our cosmic treasure chest...and now it's yours to explore! With ✨~10 million galaxies✨ in the image, there's plenty to find. Pan, zoom, and hunt for gems in this treasure chest using Skyviewer - and be sure to share your favorites with us! 🔭🧪 ➡️ skyviewer.app/explorer

For anyone applying to grad school in the US this fall, the @aas.org has made a working group to monitor which programs have faced cuts - this spreadsheet contains all the info: 🔭☄️

NASA will allow other companies to vie for its Artemis III human landing system as Starship falls behind schedule in Texas. Artemis III is now set to launch no later than 2028, suggesting a slip from its launch target of 2027. www.houstonchronicle.com/news/houston...

A reprojected view of Jupiter centered near the border with the Northern Filamentary Region. This uses image data taken by NASA’s JunoCam during the Perijove 26 flyby in April 2020. I created a simulated terrain relief to provide a sense of vertical scale to the cloudtops. flic.kr/p/2jyhVD8

Join us today (October 16) to the live webinar with @benpoulter.bsky.social We start at 17h CEST | 11h EDT More Information and access to the webinar www.issibern.ch/earth-observ...

Finally, back in April, the Lucy mission flew by and imaged the Donaldjohanson asteroid. Now they have official names for all of the features. Plus, we have a new technical term, "collum", for the "neck" that is seen on a lot of these elongated small bodies. 7/7 www.swri.org/newsroom/pre...

Happy World Octopus Day 🥳🎉🐙 🎉 We're celebrating with a little sale: discounts applied in cart, no code needed 😌 www.SculptedReef.com 📸 🐙 Caribbean Reef Octopus, Hand sculpted from clay #ArtYear #Art #ArtGallery #Sculpture #Octopus #MarineLife #CoralReef #ArtSale #BSNM #Invertebrates 🦑🐡

I am delighted to finally announce that I have accepted an offer to become a Professor of Experimental Physics and Planetology at the @unibe.ch in Bern, Switzerland. A huge thank you to everyone who believed in me and supported me over all these years! So excited for all that is to come 🚀🛰️🪨🪐

One year ago, our wonderful Hera mission lauched from Cape Canaveral and it has been performing amazingly since then. A few days after launch, we acquired these beautiful views of our Earth and Moon, which have been used to calibrate the remote sensing instruments.

Interstellar comet #3I/ATLAS imaged by the CaSSIS camera in orbit around Mars lead out of @unibe.ch 🤩 Simply amazing that we can take such observations from the orbit of other planets 😱 #planetSci

ATProto devs - what do we need to do to ship independent PDS hosting to the Astronomy community ASAP? Main Qs: 1. What software should we use (reference PDS implementation? The rsky one? Or another) 2. Legal aspects: what do we need to be careful of? Does GDPR apply? + are there PDS mod tools?

Last night, NASA's Perseverance rover looked up at the night sky once more, to capture interstellar #comet 3I/Atlas flying by the red planet. The distance was "only" 0.2 AU or 30 Mio km, far closer than the comet ever got to Earth. 🔭 #3IAtlas Credit: NASA/JPL-Caltech/ASU/Simeon Schmauß

The arc of the moral universe is long, but it bends towards justice. Except it doesn’t bend on its own—it bends because we pull it in the direction of justice. What keeps me hopeful during times like these is being surrounded by people who are doing just that.

🚨 Last chance! Apply this week for the Johannes Geiss Fellowship — don’t miss the opportunity! 🔭

Conventional wisdom says motherhood should wait for tenure as before you land a permanent post, #academia is just not that family friendly🙁 @carersinstemm.bsky.social are calling for change and to celebrate their new report, a Saturday🧵on parenting & academia! 1/9 👩‍🔬🧪🔭⚛️ ℹ️: carersinstemm.co.uk

"If we lose hope, we're doomed." We must continue Dr. Jane Goodall's mission and all fight for the future of the planet.

If you missed the @issibern.ch Game Changer Seminar by Mike Wong you can now watch it here: www.youtube.com/watch?v=v8B2... He discussed the fantastic OPAL program that uses the Hubble Space Telescope to obtain long-time baseline observations of the outer planets to understand their atmospheres.

A great colleague and friend, JB Vincent (@comet-toolbox.com), has joined these blue skies. Give him a follow if you like comets and asteroids!

Sorry it took me so long to grade your August 20 assignment, Avi Loeb. Are you sure you're ready for a class on comets? You might need to learn about things like bow shocks and chemistry.

Starting now!!! www.issibern.ch/opal-10-year... #planetSci

Actuellement deux comètes présentes dans notre système solaire semblent se tirer la bourre. Leur nom de code : C/2025 K1 ATLAS (à gauche) et C/2025 R2 SWAN (à droite). En réalité leurs trajectoires respectives sont très différentes. Reunion Island - 20 septembre 2025.

Asteroid DJ visited by the Lucy spacecraft got some names ⬇️

Julia's paper that modeled the longevity of Pluto's subsurface ocean is now out in JGR-Planets. This is a really fantastic work that shows that #Pluto may or may not have a subsurface water ocean, depending on the unknown properties of the ice and core. Super detailed work that you can find here:

It is the word of the town. ISSI is on tour again. If you are too, come say hi during this week’s #EPSC2025 here in Helsinki! – You know where to go, just follow the blue. @europlanetmedia.bsky.social @spacemarschall.net @kokotanekova.bsky.social @fabiocrameri.ch #EPSCDPS #EPSC-DPS2025

On my way to Helsinki for #EPSCDPS. If you want to help build the planetary science community here on Bluesky, you could include this QR code on your poster or show it during your talk.

Hi y'all, it's almost time for the #planetsci conference #EPSCDPS 2025 in Helsinki, Finland! Below are some great people who will be there, and who you can follow. If you want to be added/removed, let me know in the comments. go.bsky.app/fS5tre #EPSC2025 #EPSCDPS2025

Most stars form in clusters! 🔭🧪☄️ #galactic In a new paper led by @alexis-space.bsky.social, we show that >80% of stars in the local Milky Way formed in clusters. This is *much* higher than other recent estimates (~15%), and supports more traditional 'clustered' models of star formation!

I'm going to make a starter pack for EPSC-DPS 2025, organised by @europlanetmedia.bsky.social. ❔Are you going to Helsinki and want to be added? ❇️ Then let me know by commenting here! #EPSC #DPS #EPSCDPS #EPSC2025

Hey #planetSci peeps! Who is going to EPSC/DPS in Helsinki in September?

Last Wednesday the Birchgletscher in the Swiss Alps collapsed, devastating large parts of the village #Blatten and blocking the Lonza river which created a small lake. Thanks to aerial images shared by #swisstopo, I was able to create a 3D model of the area. You can explore it here 👉 skfb.ly/pxHLC

Before and after image of the large glacier collapse that covered parts of the Swiss village #Blatten. The animation is stabilized/aligned from a version shared by Pomona/Alain Amherd Source: pomona.ch/en/story/590...

I’m in beautiful Asiago (Italy) this week giving some lectures at the INAF PhD School Francesco Lucchin. Really enjoying the discussions with all the students! Such a wonderful environment!

Hello what have we here? I didn't think this would be stable, but it is! (Planets are 1 Earth-mass each)

Cool paper on arXiv: arxiv.org/abs/2505.15806 I for a minute thought this was DES data and I missed it, but it’s not

hey what's up with this (checking notes) gigantic new TNO on a gigantic orbit that just got announced by the MPC

Today, I submitted a proposal called ORIGO in response to ESA's M8 call for missions! ORIGO would collect crucial ground truths to understand the first step in planet formation: forming the first (100 km-ish) solid bodies called planetesimals. 🧵 1/5 #planetSci

Had a fun time being a part of this paper where we used a combination of SPH and N-body simulations to explore how asteroid satellites form from collisions. arxiv.org/abs/2505.03325

What is a #BlackHole? 🧐 They are some of the most extreme objects in the universe! 😎 Celebrate #BlackHoleWeek with me. And I have plenty of time to answer black hole questions while I wait for my manicure to dry 💅 📹 NASA/JPL-Caltech/R. Hurt (IPAC) 📹 NASA, ESA, K. Jackson (NASA-GSFC)

Thanks, Teddy!

Got the warmest welcome on my first day at @issibern.ch! Thank you @antonellanota.bsky.social and the entire team for helping me with this transition and making me feel a part of the team! I can’t wait for all the great things will do together 🤩

Take a look to learn more about the prospects of forming close-in exoplanets in-situ by pebble accretion!

The Dawn mission keeps giving. Dwarf planet/asteroid Vesta might not have a core! But what died that man? Great 🧵 from @sethajacobson.bsky.social on their new results ⬇️ #planetSci

This starts out cool ("Oh, hey, a failed Venus lander will reenter Earth's atmosphere! Cool!"). Then it gets ominous ("uhh, it may survive reentry and hit the surface -- we don't know where"). A real rollercoaster of exploration emotions! #planetaryscience www.space.com/space-explor...

Over the weekend I quietly launched a redesign of the gallery pages on spacefromspace.com along with now having over 400 georeferenced declassified spy satellite images on the site for anyone to access!