A late Moon maybe?
Hi All
The assumption is that the Moon forming impact occurred about 50 million years after the Solar System formed - c.4.51 Gya - and that's representative of all systems. But what if that's wrong?
Also mega-impactors seem to have been quite frequent in the early Solar System - Theia smacked into Earth, Venus was hit twice, and Mercury's crust was blown away. I really don't get how such can be called rare based on exosolar dust studies, because the seemingly impact-caused features of our system are so prominent. Unless impacts didn't make the Moon, stop Venus and strip Mercury...
Adam