Dr. Raphael Marschall
LightNews LightNews
banner
spacemarschall.net
Dr. Raphael Marschall
@spacemarschall.net
4.1K followers 360 following 920 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)🇨🇭🇺🇸🇫🇷
Posts Replies Media Videos
spacemarschall.net
Glad you enjoyed it. Yes, that’s a nice idea. If I manage to start planning it early enough we could do more head to heads.
December 30, 2025 at 8:59 PM
spacemarschall.net
If you are looking for some great accounts to follow, this starter pack of great image processors might be for you:
go.bsky.app/PUXRaYf

Also, come join us on the #planetaryScience feed by ❤️ing and 📌ing it: bsky.app/profile/did:...
December 30, 2025 at 5:57 PM
spacemarschall.net
Here is the full bracket of this year's competition. See you in 2026! ✨
Bracket for "BSky Planetary Science Image of 2025" contest, featuring small icons of 16 images grouped into four quarter-finals, four semi-finals, and one final. The winner is big in the centre. All is against a lunar surface backdrop.
December 30, 2025 at 5:53 PM
spacemarschall.net
Get back to the main thread with the links to all voting threads: bsky.app/profile/spac...
spacemarschall.net Dr. Raphael Marschall @spacemarschall.net · Dec 6
📣 Hey folks, it's time to vote on your favourite #planetaryScience image of 2025! 🧪⚛️🚀🛰️☄️🪐🌔

Follow this 🧵 not to miss a vote!

We'll have 4 quarter-finals to determine the semi-finalists, from which we'll decide the finalists and, ultimately, the winner.
Bracket for "BSky Planetary Science Image of 2025" contest, featuring small icons of 16 images grouped into four quarter-finals. There are semi-finalists and finalist placeholders against a lunar surface backdrop.
December 30, 2025 at 5:44 PM
spacemarschall.net
Here are the full results: blueskypolls.xyz/results.php?...
Full results of the final are shown as a list with bars that extend to the respective percentage of votes. " Uranus as seen by JWST" got 63.1% (70 votes) and "Gigantic TLE* above Mexico seen from the ISS" got 36.9% (41 votes). The bottom panel shows how the number of votes per day and total number of votes changed over time.
December 30, 2025 at 5:44 PM
spacemarschall.net
Congratulations also to our runner-up:

✨Gigantic TLE* above Mexico seen from the International Space Station✨
*transient luminous event (Upper-atmospheric lightning/ionospheric lightning)

Taken on: July 3, 2025
Credit: Nichole Ayers / NASA JSC / ESRS / @stim3on.bsky.social
Description by Simeon Schmauß (https://www.flickr.com/photos/semeion/54664805569/): On July 3rd, astronaut Nichole Ayers photographed a gigantic jet from the ISS. These rare upward directed electrical discharges extend ~90-100 km high into the mesosphere. The jet originated from a thunderstorm over Northern Mexico, with city lights from South Texas and the green airglow layer visible along Earth’s limb. I processed this image from the RAW file, adjusting the color profile, white balance and contrast and applied Lightroom's machine learning denoise with low strength. The RAW was provided to me by Frankie Lucena, his analysis of the event, correlating it to measurements from the Geostationary Lightning mapper and ELF-VLF radio signals can be found here: https://spaceweathergallery2.com/indiv_upload.php?upload_id=224355 City annotations referenced from Riccardo Rossi: https://x.com/RikyUnreal/status/1942367538714734609 Original image listing in the NASA archive: https://eol.jsc.nasa.gov/SearchPhotos/photo.pl?mission=ISS073&roll=E&frame=281502 Credit: Nichole Ayers / NASA JSC / ESRS / Simeon Schmauß
December 30, 2025 at 5:40 PM
spacemarschall.net
The winner of ✨ #planetaryScience image of 2025 ✨ is

✨Uranus as seen by JWST✨
Taken on: October 6, 2025
Credit: NASA/ @esa.int /CSA/ @stsci.edu / @andrealuck.bsky.social

Full resolution: www.flickr.com/photos/19227...

🧪⚛️
Image of Uranus taken by the James Webb Space Telescope, showing a whitish north polar region, vivid blue-greenish atmosphere and a few whitish elongated storms visible around the pole. The planet is surrounded by clearly defined ring system set against the black background of space. Source: https://www.flickr.com/photos/192271236@N03/54879990600/ Credit: NASA/ESA/CSA/STScI/AndreaLuck CC BY
December 30, 2025 at 5:37 PM
spacemarschall.net
And the winner, with 63.1% of the vote is 🥁🥁🥁🥁🥁

✨Uranus as seen by JWST✨
Taken on: October 6, 2025
Credit: NASA/ @esa.int /CSA/ @stsci.edu / @andrealuck.bsky.social
Image of Uranus taken by the James Webb Space Telescope, showing a whitish north polar region, vivid blue-greenish atmosphere and a few whitish elongated storms visible around the pole. The planet is surrounded by clearly defined ring system set against the black background of space. Source: https://www.flickr.com/photos/192271236@N03/54879990600/ Credit: NASA/ESA/CSA/STScI/AndreaLuck CC BY
December 30, 2025 at 5:32 PM
spacemarschall.net
Here is the thread with the final: bsky.app/profile/spac...

Voting ends on Tuesday, Dec. 30, at 3:00 p.m. UTC/4:00 p.m. CET/10:00 a.m. EST/7:00 a.m. PST/midnight JST.
spacemarschall.net Dr. Raphael Marschall @spacemarschall.net · 15d
Final of ✨ #planetaryScience image of 2025 ✨ is here:

Uranus vs. Earth
or
outer vs. inner Solar System

🗳️ The vote link is 3 posts down. Voting ends on Tuesday, Dec. 30, at 3 p.m. UTC/4 p.m. CET/10 a.m. EST/7 a.m. PST/midnight JST. 🧪⚛️
Bracket for "BSky Planetary Science Image of 2025" contest, featuring small icons of 16 images grouped into four quarter-finals. Then there were two semi-finals and the filled in spots of the final with Uranus on the left and a lightning into the Earths atmosphere on the right. There are winner placeholders is still just a question mark. All is set on a lunar surface backdrop.
December 29, 2025 at 9:23 PM
spacemarschall.net
If you want to "re-live" the competition from last year then here is the thread for 2024: bsky.app/profile/spac...
spacemarschall.net Dr. Raphael Marschall @spacemarschall.net · Dec 6
📣 Hey folks, It's time to vote on your favorite #planetaryScience image of 2024! 🧪⚛️🚀🛰️☄️🪐🌔

@nickattree.bsky.social, @planettreky.bsky.social, @spacejammie.bsky.social, @asrivkin.bsky.social and helped me select some images. Give them a follow if you aren't already.

Follow this 🧵 to not miss a vote!
Bracket for "BSky Planetary Science Image of 2024" contest, featuring small icon close-ups of 16 images grouped into four quarter-finals. There are finalist placeholders against a lunar surface backdrop.
December 29, 2025 at 2:16 PM
spacemarschall.net
If you want to go and read a bit more about these "sprites" on Wikipedia (en.wikipedia.org/wiki/Upper-a...) or the video in this post: bsky.app/profile/poma...
December 29, 2025 at 1:59 PM
spacemarschall.net
Indeed, I haven’t quite seen anything like it before.
December 27, 2025 at 2:53 PM