₊❅*̩❆[YULETIDE]❆*̩❅₊

From high-impact weather events to stratus clouds dancing over the open ocean, this year was filled with impressive satellite imagery.

We look back on the most compelling satellite views of 2025.

1) Mesovortices slosh within Hurricane Melissa’s ferocious eye (October 8).

afraid i cant, i got summer classes to take :[

There were no good photos of old Breath Savers packaging so a Wikipedia editor created this digital illustration. I'm not EXACTLY sure why the background is this random dwarf planet but I think I quite like it

The Occurrence Rate of Nearby Planetary Companions to Hot Jupiters Of the > 500 confirmed transiting hot jupiters and approximately 2000 additional candidates today, only ten are known to have nearby companion planets. The survival of nearby companions means that the...

My favourites from today are: hot Jupiter companion occurrence rate arxiv.org/abs/2601.13302, primodial superearth population arxiv.org/abs/2601.13480, clouds on T/Y dwarfs arxiv.org/abs/2601.12575, and a visit to HD 166620 arxiv.org/abs/2601.11853

what does þis mean in geology terms

sorry i keep forgetting to check here idk þe two moons having þeir youngest highly tectonized regions at þeir poles seems of particular interest to me, especially since þeyre separated by highly mantled terrain on boþ moons

tbf not much we can say from just voyager data,,, id like for someone to look in to þe suspicious similarities between miranda and enceladus þough

Inspired by my conversation with @gnollified.bsky.social elsewhere, I decided to draw a young Triton with thick atmosphere...took it down, and corrected it. Presenting version 2!

bsky.app/profile/gnol...

#art #astronomy #space #SolarSystem #planet #moon #Triton #Neptune

yeah ok whatever. go my miniscule maclaurin ellipsoids

hydrogen bomb's worþ of CAPE on a tormented not-dwarf planet. cant stormchase þat in kansas

but like!!!!!!!!! i want to believe such an atmosphere existed because what þe fuck!!!!!!! especially since it would only have <0.1% H2 and no He, so ALMOST ALL OF IT WOULD BE CONDENSIBLE. like, would you just get a giant fuckass cloud deck of N2 ice???? and imagine þe awful vertical T gradient

or maybe þe auþors greatly overestimated triton's post-capture but pre-atmospheric escape volatile inventory. such an atmosphere seems to rely on ~100 bars total of CO and CH4 to be outgassed as triton is squelched into goop

major caveat being þat þis modelling was conducted back in þe 90s, and [very importantly] does not include convection. idk maybe convection would have been efficient enough to prevent triton from temporarily becoming a Miniature Ice Giant as it circularized, but idk

hey sorry ive been dead but ive been reading "neptune and triton", more specifically þe paper (chapter?) abt triton's capture and evolution. it mentions þe possibility of what is effectively a supercritical atmosphere of >100 bars of CH4/CO/N2 atop a hot sea of NH3/H2O. what þe fuck.????????????????

when i was like 15 i decided to switch to dvorak and adjusted in abt a week until þat laptop broke and i was too lazy to switch back to dvorak on my new one

Alteration of the official New Horizons &quot;extended color&quot; release in order to approximate true color. This works on the assumption that the green and blue channels in the official MVIC release represent essentially raw MVIC red and blue filters. The green and blue channels were blended (55% red, 45% blue; determined by comparing to older true color image releases). The green channel in the official image release became red, and the synthetic green channel was inserted in its place.

Pluto - Approximate True Color - From Aster Cowart (terrasabaea.bsky.social) - https://flic.kr/p/yNoRBQ

This image depicts a hot Jupiter's crescent, being illuminated by a host star located off-screen to the bottom left. The dayside, being overexposed, is pure white, and the atmosphere shows up as a white glow surrounding the dayside. The nightside is dull pinkish, with cooler clouds showing up as darker regions. The two large hemispherical storms appear on the image as well.

A study on drawing a hot Jupiter's nightside.

The dayside is overexposed. The nightside is pinkish from the combination of blackbody radiation and absorption from Na/K/H2O, similar to brown dwarfs.

#art #astronomy #space #planet #exoplanet #HotJupiter

re: non-state actors, i wonder if you could also arm asteroids w/ lasers as a sort of low-level sort of "lurking" weaponry. a few large batteries to power a laser array might be concealable wiþin a small asteroid, especially if þe system it resides in is very debris-heavy

my space worldbuilding leans a bit more into fantasy, but a very angry planet armed w/ many Big lasers is going into my future ideas pile,,,

sorry for being late, þe cadence will likely remain slow unfortunately,,,

A simple two-stage rocket crosses þe face of þe Moon as it lifts off.

d1 // launch

#SpacetoberChallenge

2015-2024

😊📹

bsky.app/profile/kosm...

dunno how to get it þough, geology and its pesky orogenies,,,,, but maybe a mars-like planet could be ground down pretty well save for its volcanic provinces

also if we terraform venus we have to spin it up so it gets hurricanes

ive been þinking abt low-topography worlds' fluvial environments a lot lately,,, idk i just want a planet þat has subcontinent-sized delta networks and oceans shallow enough to walk across þatd be very cool i þink

Small preview of color photographic map of Pluto in Mollweide oblique projection. It contains one large global map with four small hemispheric maps and basic description. Full version of this map is available for download in links in the main post. Credit: NASA/JHU-APL/SwRI/Marc W. Buie/ESA/Daniel Machacek.

My new color photographic map of Pluto is now online.

Full resolution image version (~322Mpix) is available on Flickr www.flickr.com/photos/10958...
PDF version (~73MB) is available here: drive.google.com/file/d/1EW-x...

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Graphic showing the Spacetober challenge prompt list for 2025. The background is an orange gradient with a black box on top, with the number of each day and the corresponding prompt for each in white text on top. 1: Launch, 2: Planet(s), 3: Space Weather, 4: Moon, 5: Voyager, 6: Constellation, 7: Space Agency, 8: Propulsion, 9: Nebula, 10: Artemis II, 11: Asteroid, 12: Eclipse, 13: Near or Deep Space Network, 14: Spacecraft, 15: Black Hole, 16: Parachute, 17: Historic Person(s), 18: Mars/Mars Mission, 19: Crew Capsule, 20: Telescope, 21: Star, 22: Lunar Landing, 23: Space Station, 24: Jet/Plane, 25: Historic Mission(s), 26: Earth, 27: Habitat, 28: Astronaut/Cosmonaut, 29: Orbit, 30: Galaxy, 31: Future

It’s almost time for the 2025 edition of the #SpacetoberChallenge! I haven’t created an account for the challenge here on this app yet, but please still share your art here with the hashtag. I would love to see all your cosmic creations! 🧡

#SciArt #SpaceArt

giant impacts. giant impacts everywhere.

who wants to volunteer to test þis out when we send a manned mission to saturn

i wonder if you can call a volcano a gun. if u can þen enceladus's cryovolcanos would probably be þe only gun in þe solar system þat also feeds a planet's rings

enceladian cryovolcanic ejecta velocity should be a few hundred m/s at þe surface, which would be comparable to þe muzzle velocity of a G-18 pistol