#planetology — Public Fediverse posts

Katabatic winds? Twin suns? Even georeactors. All familiar ingredients, but combine them in one planet, and you have one truly alien world...

Read more at my #blog: https://www.adamasnemesis.com/2026/08/06/of-georeactors-katabatics-twin-suns-and-climatology/

This post's featured image is "Ripples in the Sky", captured in Iowa by me (hey, pressure waves figure, so why not?).

#scifi #sciencefiction #worldbuilding #geology #climatology #climate #alienplanet #planet #planetology #atmospheres #oceans

Are you looking for a PhD position in the field of experimental planetary science? Do you have a background in Geochemistry, Mineralogy, Petrology, or Earth and Planetary Sciences in general?

The ERC Starting Grant group ELMO led by Christian Renggli @bsky.app.profile.renggli.bsky.social is looking for a doctoral researcher to join them: https://www.mps.mpg.de/phd/experimental-laboratory-magma-ocean

Application deadline is 1 June 2026.

#PhDPosition #MPSGoettingen #JobAd #Planetology #PlanetaryScience #EarthScience #Geochemistry #Mineralogy #Petrology #MagmaOcean #Planets #RockyPlanets #Space #Astrodon #SolarSystem #Goettingen #Germany

[#Waves and #Plasma] Numerous #moons orbit #Jupiter, including #Io, whose volcanic activity causes the ejection of #matter and the formation of a magnetized #plasma disc—or #magnetodisc—in the equatorial plane of the gas giant.

How does the plasma in this magnetodisk manage to remain in a state of #equilibrium? By emitting waves, according to a new study based on data acquired by the #Juno probe, which has been orbiting #Jupiter since 2016.

https://www.irap.omp.eu/en/2025/11/jupiter-natural-regulators-maintain-the-balance-of-its-magnetized-plasma-disk/

#astrophysics #planetology

[#Juno and Jupiter's Galilean moons] In the early 2000s, #Hubble identified ultraviolet auroral signatures of three of Jupiter's four Galilean moons: Io, Europa, and Ganymede. Due to its low intensity, Callisto's signature remained elusive... until that day in September 2019: https://www.irap.omp.eu/en/2025/09/juno-identifies-the-missing-auroral-footprint-of-the-moon-callisto-at-jupiters-poles/

Congratulations to the team involved, whose study “completes our understanding of moon-planet couplings in the Jupiter system”! 👏 👍

#astronomy #planetology #Jupiter #Juno

"The results suggest that scientists should account for dams in their sea level rise projections... Global sea levels rose by 4.7 to 6.7 inches (12 to 17 cm) during the 20th century. About a 1/4 of that amount of water is behind dams, which means that depending on where you are in the world, dams will influence sea levels...

That's another thing we need to consider, because these changes can be pretty large, pretty significant..."

Link: https://www.livescience.com/planet-earth/dams-around-the-world-hold-so-much-water-theyve-shifted-earths-poles-new-research-shows?ICID=ref_fark

#Planetology #Geology #Space

[#Ganymede and #Callisto: so close and yet so different] They were born in the same environment - the disk of gas and dust surrounding #Jupiter, but differ in their internal structures. What explains this divergence?

The temperatures prevailing within the accretion regions of the two icy moons are thought to be responsible for this differentiation, according to work by researchers at IRAP and @LAM_Marseille.

More info : https://www.irap.omp.eu/en/2025/06/ganymede-and-callisto-frozen-destinies-with-divergent-origins/

#planetology #astronomy

[#Ganymède et #Callisto : si proches et pourtant si différentes] Elles sont nées dans le même environnement - le disque de gaz et de poussière entourant #Jupiter, mais se distinguent par leurs structures internes. Comment expliquer cette divergence ?

Les températures régnant au sein des régions d'accrétion des deux lunes glacées seraient responsables de cette différentiation, d'après les travaux de chercheurs de l'IRAP et du @LAM_Marseille.

Infos+ : https://www.irap.omp.eu/2025/06/ganymede-et-callisto-destins-geles-aux-origines-divergentes/

#planetology

Maybe She's trying to fling us off?

Link: https://www.timeanddate.com/news/astronomy/earth-fast-rotation-2025

#Astronomy #Planetology #Geology

[Focus on the #EnVision mission] Why have #Venus and Earth evolved so differently? This is the question to be answered by the EnVision #SpaceMission of the European Space Agency - ESA, scheduled for launch in 2031.

To this end, the European #probe will carry several instruments - including an imaging #spectrometer, to which IRAP staff are contributing. Observations will be made in the UV and IR domains, in order to monitor temporal variations in #surface temperature and gas concentrations within the #atmosphere - and thus gain a better understanding of interactions between the Venusian atmosphere and surface.

Info+: https://www.irap.omp.eu/event/the-envision-venus-mission/

#astrophysics #planetology #spacemission

[Focus sur la mission #EnVision] Pourquoi #Vénus et la Terre ont-elles évolué si différemment ? Telle est la question à laquelle devra répondre la #MissionSpatiale EnVision de l' European Space Agency - ESA dont le lancement est prévu pour 2031.

A cet effet, la #sonde européenne embarquera plusieurs instruments - un #spectromètre imageur notamment, auquel contribuent les personnels de l'IRAP. Des #observations seront effectuées dans les domaines UV et IR afin de suivre les variations temporelles de la température de #surface et des concentrations de gaz au sein de l'#atmosphère - et donc, de mieux comprendre les interactions entre l'atmosphère et la surface vénusiennes.

Info+ : https://www.irap.omp.eu/event/the-envision-venus-mission/

#astrophysics #planetology #spacemission

[Under the Martian #tropics ...] There was a time when #water abounded and shaped the Martian #landscapes. This is evidenced by several fragments of clear, alumina-rich #rocks recently analyzed by the instruments of the #Perseverance rover ...

These rocks contain minerals such as #kaolinite, one of the markers of a once habitable environment. Infos+ : https://www.irap.omp.eu/en/2025/02/could-mars-have-had-a-tropical-climate-in-the-past/

#planetology #Mars #mars2020

[Sous les #tropiques martiens ...] Il fut un temps où l' #eau abondait et façonnait les #paysages martiens. En témoignent plusieurs fragments de #roches claires riches en alumine récemment analysés par les instruments du rover #Perseverance ...

Ces roches renferment des minéraux telle la #kaolinite, l'un des marqueurs d’un environnement autrefois habitable. Infos+ : https://www.irap.omp.eu/2025/02/mars-aurait-elle-connu-un-climat-tropical-passe/

#planetology #Mars #mars2020

[Assistance gravitationnelle] Ce 18 février, la sonde #SolarOrbiter de l'ESA s'approchera de la surface de #Vénus, utilisant son champ de #gravité afin de modifier sa trajectoire. Objectif : pointer ses #instruments en direction des régions polaires du #Soleil.

Depuis cette #orbite, la sonde collectera de nouvelles données inédites qui permettront d'affiner notre compréhension de l'activité solaire. Info+ : https://www.esa.int/Enabling_Support/Operations/Solar_Orbiter_ready_for_close_encounter_with_Venus

#astrophysics #planetology #solarsystem

[A la surface de #Mars ...] se forment et se déplacent des #tourbillons de #poussière. Le tourbillon figurant au premier plan de cette vidéo acquise par la NavCam embarquée sur le rover #Perseverance dépasse les 300 mètres de haut. Il se déplace à la lisière du cratère Jézéro. Credit: NASA/JPL-Caltech/Simeon Schmauß

#Planetology #Astrophysics #Astronomy

[#EnVision: en route to #Venus 👍] On Tuesday, the European Space Agency - ESA awarded Thales Alenia Space a contract to build the EnVision probe destined for Venus. The onboard instruments will study the #planet's inner core, mantle and atmosphere, as well as their interactions, with unrivalled precision. Objective: to understand a planet's evolution towards #habitability - or uninhabitability.

Details+ : https://www.esa.int/Science_Exploration/Space_Science/Envision/Signed_and_sealed_Envision_can_move_towards_construction

#planetology #SpaceMission

[Moon formation scenari] After detailed 3D simulations and isotopic analysis of terrestrial and lunar rocks have swept aside the hypothesis of a collision between our proto-Earth and a planet called Theia, which scenario should be favored?

That's the topic on which Erik Asphaug, planetary scientist at the University of Arizona, will be speaking to the IRAPians this Tuesday afternoon: https://www.irap.omp.eu/event/if-at-first-you-dont-succeed-moon-formation-in-a-collision-chain/ Great discussions ahead 💬 👋

#planetology #Moon #MoonFormation

[Scénari de formation de la #Lune] Après que des #simulations3D détaillées et l'analyse isotopique de #roches terrestres et lunaires aient balayé l'hypothèse d'une #collision entre notre proto-Terre et une planète nommée #Théia, quel scénario privilégier ?

C'est sur ce thème qu'interviendra Erik Asphaug, planétologue à l'University of Arizona, auprès des IRAPiens ce mardi aprèm : https://www.irap.omp.eu/event/if-at-first-you-dont-succeed-moon-formation-in-a-collision-chain/ De belles discussions en perspective 💬 👋

#planetology #Moon #MoonFormation

[#Perseverance : un rover au top !] Après plusieurs semaines d'ascension, Perseverance est arrivé au sommet du cratère #Jezero. Là se trouvent des #roches de la croûte martienne primitive - parmi les plus anciennes de notre #SystèmeSolaire, éjectées lors de l'impact. Une nouvelle aventure scientifique commence donc pour les équipes impliquées : https://www.nasa.gov/missions/mars-2020-perseverance/perseverance-rover/nasas-perseverance-rover-reaches-top-of-jezero-crater-rim/

Notre fil d'actus reprendra en tout début d'année 2025.
D'ici là, joyeuses fêtes à tous et toutes 😉 🎉 🥂
... et merci de votre fidélité ! 👍

⬇️ Perseverance on top of Jezero crater (Credit: NASA/JPL-Caltech/Simeon Schmauß)

#astrophysics #planetology #Mars #Perseverance

[#PhD Day] This Thursday, May 23, IRAP's #doctoral students will present their #research work to all the laboratory's staff, either orally or in the form of #posters. It's an opportunity to gauge the diversity of the #themes addressed ...

#Planetology, planetary and stellar #seismology, astrophysical #fluid mechanics, stellar evolution, #exoplanets, multi-messenger #astronomy, #cosmology, etc. are on the program.

A great day of exchanges to all 🧐 🤩

https://www.irap.omp.eu/doctorants-irap/journee-des-theses-2024/

[#FridayReading] Who are the 50 greatest contributors to our current knowledge of the #Sky and the objects that populate it? Who are the men and women who have made remarkable contributions to the development of #astronomy, #astrophysics, #planetology, #cosmology?

The BBC offers us a short retrospective of the #history of astronomy, through the remarkable contributions of 50 people, from ancient Greece to the present day : https://www.skyatnightmagazine.com/space-science/famous-astronomers

Three shots captured by the various instruments of the Curiosity rover on Feb. 16

1. by the Right Navigation Cam, credit: NASA/JPL-Caltech
2. by ChemCam, credit: NASA/JPL-Caltech/LANL
3. by the Left Navigation Cam, credit: NASA/JPL-Caltech

#mars #curiosity #rover #space #nasa #jpl #astrodon #science #engineering #STEM #photography #blackandwhite #goelogy #chemistry #planetology #ChemCam #camera

HAPPY BIRTHDAY, AERITH! To celebrate, here's a video essay discussing The Sealed Tower of the Cetra from Final Fantasy VII: Ever Crisis, and how it may be relevant to the upcoming game FFVII Rebirth! 💚

🔗https://youtu.be/VKzkygNsYMc

#Aerith #Aeris #AerithGainsborough #Cetra #Ancients #Sephiroth #Jenova #FinalFantasyVII #FinalFantasy7 #Rebirth #Evercrisis #FFVIIRebirth #FF7Rebirth #FFVIIEverCrisis #FF7EverCrisis #FFVII #FF7 #Midgar #BattleTowers #MidgarFalls #SealedTowerOfTheCetra #Planetology #Norse #NorseMythology #Yggdrasil #Níðhöggr #Niddhog #Ragnarok #Clerith #Cleris #クラエア #Kabbaway #Kabba #Kab #Kabbidge #Kabbidges #A_Quirky_Australia #TheGamingKabbanet #The_Gaming_Kabbanet #Gaming #Theory #VideoEssay #Analysis #Game #VideoGame #Video #YouTube #YT #YouTuber #YTer #ContentCreator #Content_Creator

#TIL, and i wonder why i didn’t know this before.
#Jupiter and #Saturn aren’t really made up of gases, technically speaking. Almost all of it is supercritical fluid. The critical point for Hydrogen ist just 32.938 K, 1.2858 MPa, that for Helium much lower.

Otoh, supercritical fluid planet hasn’t quite the ring as gas giant.

#astronomy #planetology #supercriticalFluid #SupercriticalFluidPlanet #gasGiant