Sentences with phrase «very deep crater»

Not exact matches

They also looked at whether craters made by the comets hitting the surface could excavate enough nitrogen — but that would require a very deep layer of nitrogen ice at the surface, which is not proven.

Scientists thought most of Vesta outside the south polar region might be flat like the Moon, yet some of the craters outside that region formed on very steep slopes and have nearly vertical sides, with landslides often occurring in the regolith, the deep layer of crushed rock on the surface.