Dr. Raphael Marschall
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Dr. Raphael Marschall
@spacemarschall.net
4K followers 340 following 760 posts
#asteroids #comets #protoplanetarydisks #planetaryScience 🧪🔭🚀🛰️☄️
Science Programme Manager @issibern.ch. Co-I of ESA's Comet Interceptor, collaborator on NASA's Lucy and ESA's Rosetta missions.
www.spaceMarschall.net
(he/him)🇨🇭🇺🇸🇫🇷
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spacemarschall.net
Dr. Raphael Marschall @spacemarschall.net · Nov 14
Hello to all new followers! I'm a 🇨🇭 physicist and planetary scientist at the Observatory in Nice 🇫🇷. I study asteroids, comets, and similar bodies and how they formed/evolved. This helps us understand how our Solar System formed. I'm also involved in several space missions.
#planetaryScience 🔭🧪🚀🛰️☄️🪨
Family picture of all asteroids visited by spacecraft except for Ceres. The different asteroids are to scale with Vesta being over 500 km large to Itakawa at only 500 m. High resolution image here: https://spacemarschall.net/outreach/asteroid-family-picture/ Credit to individial asteroids in the legend.
spacemarschall.net
Help me try out this poll tool for bluesky by answering the following question: Which is your favourite Galilean moon?

1️⃣ Io
2️⃣️ Europa
3️⃣ Ganymede
4️⃣ Callisto

📅 Ends: November 28, 2025, 12:00 PM UTC

📊 Show results
November 25, 2025 at 1:54 PM
Reposted by Dr. Raphael Marschall
sculptedreef.com
🚨 BLACK FRIDAY DEALS HAVE ARRIVED 🚨

⚠️ This is not a drill 🎉 Original Art Collectors and Gift Givers 🎁 come take a look at the entire collection:

SculptedReef.com

#ArtYear #Art #ArtGallery #Sculpture #Octopus #CoralReef #MarineLife #ArtSale #BSNM #Invertebrates 🦑🐡
A hand sculpted octopus depicting the species Caribbean Reef Octopus, standing on a black base with carvings that glow blue in the dark.
November 25, 2025 at 10:03 AM
spacemarschall.net
Hey #planetSci friends, the end of the year is nearing. Does anyone want to help me put together an Image of the Year Bracket?

If you want to propose your favourite planetary science image of 2025, place it below with a link to the source and when it was published.
Bracket for "BSky Planetary Science Image of 2025" contest, featuring small icon of 16 boxes with question marks grouped into four quarter-finals. There are finalist placeholders against a lunar surface backdrop.
November 24, 2025 at 4:04 PM
Reposted by Dr. Raphael Marschall
comet-toolbox.com
When I am not studying asteroids, I write songs about them ;)
Exactly 4 years ago, I released a track to celebrate the success of the DART mission. The song is obviously called "Dimorphos" !

3xperimental.bandcamp.com/album/dimorp...

#metal, #planetaryscience
Dimorphos, by 3xperimental
2 track album
3xperimental.bandcamp.com
November 24, 2025 at 8:32 AM
Reposted by Dr. Raphael Marschall
planetneish.bsky.social
An article from Science about the changes LPSC has made to its abstract submission process. As my colleague @theplanetaryguy.bsky.social states, "This is censorship". www.science.org/content/arti...
‘This is censorship.’ Conference requires abstracts to comply with Trump anti-DEI order
NASA-funded planetary science institute previously scrubbed hundreds of records from its archive
www.science.org
November 20, 2025 at 7:45 PM
Reposted by Dr. Raphael Marschall
cmundell.esa.int
Next week, at our @esa.int Ministerial Conference in Bremen, Germany, the governments of our 23 member states set the ambition of Europe in space, through their financial & mandate to our DG Dr @josefaschbacher.esa.int. We have prepared an exciting, important and ambitious proposal. #TheTimeIsNow
November 20, 2025 at 11:12 AM
Reposted by Dr. Raphael Marschall
mikewong.solarsystem.social.ap.brid.gy
@issi_media hosted me for an online seminar a couple of months ago:

https://solarsystem.video/w/cn9pZHLdFd7wHx537e3Fif
OPAL 10-year anniversary with Mike Wong
The Outer Planet Atmospheres Legacy (OPAL) program with Hubble was started in 2014 with the goal of studying time-domain phenomena in Jupiter, Uranus, and Neptune, with Saturn added in 2018 once th...
solarsystem.video
November 18, 2025 at 6:00 PM
Reposted by Dr. Raphael Marschall
astronomy.blue
Do you enjoy the Astronomy feeds? Help us to build them! 🔭

We'd especially love to hear from you if you're a frontend developer, but we're looking for a range of skills:
We're looking for new developers! - Blog - The Astrosky Ecosystem
We'd like to expand our team to include new devs. We'd especially love to hear from you if you're a frontend developer.
astrosky.eco
November 19, 2025 at 8:19 AM
Reposted by Dr. Raphael Marschall
emily.space
A paper by @univie.ac.at researchers found an awful security flaw in WhatsApp - there was zero rate limiting preventing anyone from querying the details of every single WhatsApp user on earth in just a few hours 🫠
A Simple WhatsApp Security Flaw Exposed 3.5 Billion Phone Numbers
By plugging tens of billions of phone numbers into WhatsApp’s contact discovery tool, researchers found “the most extensive exposure of phone numbers” ever—along with profile photos and more.
www.wired.com
November 19, 2025 at 5:44 AM
Reposted by Dr. Raphael Marschall
realscientists.de
Wie stellt man ein erfolgreiches Team zusammen und wie hält man es bei Laune? Wichtige Fragen bei einem so komplexen Aufgabenfeld wie Wissenschaft.

Hauptproblem: Erfolg ist schlecht messbar

Mein Credo: Spaß, Kreativität & Lernen stehen im Vordergrund, dann stellt sich der Erfolg von selbst ein.
November 18, 2025 at 3:02 PM
Reposted by Dr. Raphael Marschall
planetplanet.bsky.social
If you live in France, a new documentary about 'Oumuamua comes out Thursday evening, starting at 9pm on the France 5. Replays on france.tv after

I was scientific advisor (and I show up in several places), which was a great pleasure.

www.francetvpro.fr/contenu-de-p...
France TV - Replay et Direct tv des chaînes France Télévisions (ex Pluzz)
Retrouvez toutes les vidéos, articles et podcasts des programmes des chaînes de France Télévisions.
france.tv
November 18, 2025 at 11:21 AM
spacemarschall.net
Hi #planetaryScience folks, we have an open position for a *Professor in Planetary Sciences* at the Space Research & Planetary Sciences Division of the @unibe.ch.

Application deadline: *Jan 31, 2026*

Full ad: ohws.prospective.ch/public/v1/jo...

Reach out to me if you have any questions!

🧵 1/5
Uni Bern: Professor in Planetary Sciences
The Division of Space Research and Planetary Sciences of the Physics Institute, University of Bern, Switzerland, invites applications for a full-time position as a Professor in Planetary Sciences.
ohws.prospective.ch
November 17, 2025 at 3:51 PM
Reposted by Dr. Raphael Marschall
benpoulter.bsky.social
Submit your abstract to #EGU26 & share latest science on "Warming Induced Greenhouse Gas Emissions from terrestrial, coastal and marine systems: Connections to Earth system stability, policy and mitigation"
meetingorganizer.copernicus.org/EGU26/session/56456
Deadline Jan 15 @drmonteverde.bsky.social
November 16, 2025 at 1:49 PM
Reposted by Dr. Raphael Marschall
mmmmeier.bsky.social
Did you know you can search the Meteoritical Bulletin Database for meteorites found on Mars (i.e., *not* martian meteorites, but meteorites found by rovers on the surface of Mars)? For the Moon, too. Here's the link for Mars:
November 14, 2025 at 10:06 AM
spacemarschall.net
OMG!
November 12, 2025 at 12:21 PM
Reposted by Dr. Raphael Marschall
jtuttlekeane.bsky.social
Hey planetary scientists! I don’t know about y’all, but ADS makes my life so much easier.
November 5, 2025 at 7:27 PM
Reposted by Dr. Raphael Marschall
weatherdak.bsky.social
Alrighty, ready to see something really cool? (and maybe a little nauseating)

The evolution of Hurricane Melissa's mesovortices at peak strength.
October 29, 2025 at 8:10 PM
Reposted by Dr. Raphael Marschall
philplait.bsky.social
Nostalgia isn't what it used to be.
October 28, 2025 at 7:31 PM
Reposted by Dr. Raphael Marschall
soto.space
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...
Dust from far side of the moon could reveal more about origin of water in our solar system
Dust brought back to Earth by China's Chang'e-6 mission contains rare meteorite relics that could change our understanding of sources of water and other life-essential ingredients in our solar system.
phys.org
October 23, 2025 at 4:27 PM
Reposted by Dr. Raphael Marschall
astrobin.com
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
Apparent Angle Evolution of the Comet’s Ion Tail (C/2025 A6 (Lemmon))
October 27, 2025 at 12:05 PM
Reposted by Dr. Raphael Marschall
asrivkin.bsky.social
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. 🧵
October 26, 2025 at 2:57 PM
Reposted by Dr. Raphael Marschall
vrubinobs.bsky.social
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
A field of galaxies of many shapes, sizes and colors, as well as the bright multi-colored points of stars. At left is a large elliptical galaxy, smooth like a polished stone. At right lies a large spiral galaxy that is nearly a ring, with bright golden core. To its lower left is a smaller spiral with a barred core. At top and bottom, two bright stars shine brightly with multi-colored diffraction spikes emanating out. In the background, hundreds of galaxies are just smudges of various colors. A field of galaxies of many shapes, sizes and colors, as well as the bright multi-colored points of stars. At top left is a large galaxy that is smooth like a stone, with wisps like cotton candy spiral from left and right. In the background, hundreds of galaxies of many shapes are just smudges of various colors against the black of space. / A field of galaxies of many shapes, sizes and colors, as well as the bright multi-colored points of stars. At bottom left is an elegant two-armed galaxy, with arms extended like a dancer viewed from above. The bright points of three stars form a triangle at top center. In the background, hundreds of galaxies of many shapes are just smudges of various colors against the black of space. A field of galaxies of many shapes, sizes and colors, as well as the bright multi-colored points of stars. At top right is a large galaxy with two whirling spiral arms wrapping around like a hug. At bottom left, two smooth elliptical galaxies appear near each other, like champagne glasses in the midst of a cheers. A bright star above the pair has red, green, and blue diffraction spikes emanating out. In the background, hundreds of galaxies of many shapes are just smudges of various colors. A field of galaxies of many shapes, sizes and colors, as well as the bright multi-colored points of stars. At center is a spiral galaxy peppered with tight, knotted clumps of vivid blue, young stars. In the background, hundreds of galaxies of many shapes are just smudges of various colors against the black of space.
June 24, 2025 at 11:47 PM
Reposted by Dr. Raphael Marschall
emily.space
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: 🔭☄️
US Astronomy Graduate Admissions, AY 2025-2026
docs.google.com
October 23, 2025 at 11:48 AM
Reposted by Dr. Raphael Marschall
andrealeinfelder.bsky.social
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...
Could Blue Origin develop Artemis III moon lander? NASA reopens bidding.
Acting NASA Administrator Sean Duffy announced Monday that he would allow other companies to compete for the Artemis III landing contract that was awarded to the SpaceX Starship spacecraft.
www.houstonchronicle.com
October 20, 2025 at 5:45 PM
Reposted by Dr. Raphael Marschall
kevinmgill.bsky.social
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
NASA/JPL-Caltech/SwRI/MSSS/Kevin M. Gill
October 19, 2025 at 8:54 PM