Comment l'astéroïde Vesta a failli être une planète ?

La sonde Dawn de la NASA qui a survolé Vesta a fourni des données qui montrent que cet astéroïde aurait devenir une planète naine si elle n'avait pas connu une origine complexe.

France Culture

More intrigue on the presence of water ice on #DwarfPlanetCeres , this paper looks at permanent shadowed regions in northern latitudes using different ways to model the topography. Quite interesting that these regions will still see sunlight in relative short timespans due to 15-20 deg changes in Ceres' obliquity.

https://www.psi.edu/blog/history-of-ceress-young-cold-traps/

https://iopscience.iop.org/article/10.3847/PSJ/ad3639

#DawnMission

History of Ceres’s Young Cold Traps

Ceres, the largest asteroid in our Solar System, harbors a dark secret: Extremely young ice deposits in permanently shadowed craters near its poles. If that sounds vaguely familiar, it’s because our…

Planetary Science Institute

Let me finish this #LPSC2024 thread with a #DwarfPlanetCeres paper, covering features I always found amusing in #DawnMission photos. Attached is one of my favs, in Kupalo crater (right "besides" Juling) https://photojournal.jpl.nasa.gov/jpeg/PIA20944.jpg

Le Becq et al: "A new model of crater degradation on Ceres involving ice sublimation"
https://www.hou.usra.edu/meetings/lpsc2024/pdf/1195.pdf

Thread start: https://mastodon.social/@sharponlooker/111870153396426610

@nasapics_bot yet another throwback to the golden days of #DawnMission at #DwarfPlanetCeres and all those wacky craters and rims

https://photojournal.jpl.nasa.gov/catalog/PIA20952

Catalog Page for PIA20952