Rheasilvia

[steorra]

Vesta's giant south polar basin has been named Rheasilvia.

Tethys and Dione: Probably not active after all

[steorra]

A few years ago, there were some hints that Saturn's moons Tethys and Dione might have some sort of geological activity.

Follow-up observations to try to confirm this found no evidence of such activity, so it seems that they aren't active after all.