Can't get into the actual paper without spending money, but other articles have mentioned it.

This is a pretty hydrated magnesium sulfate. If I understand it right, the "hexa" means it "locks" six water molecules per salt molecule. That sounds odd to me. These salts (various) are found on Mars. I found articles that said hexahydrite wouldn't be stable on the surface of Mars, and this is in areas that were supposed to have once had an ocean. How is hexahydrite on an asteroid?

How recent is that crater on Ceres? Has anyone mentioned that?

Science getting too deep again. Now heading back for shallow end of pool.

Sounds like Ceres might have a lot of ice under there somewhere. Or maybe even liquid?