Astronomy on MSN

Was Mercury formed by a cosmic hit-and-run?

The early years of our solar system were a period of unimaginable chaos and violence, a gravitational free-for-all where colliding planetary embryos competed for survival. In this tumultuous ...
IFLScience on MSN

Earth Was Uninhabitable Until Collision That Created The Moon "Ultimately Made Life Possible"

If you’re wondering why we haven’t met aliens, it might be because habitable zone planets just don’t get smashed almost to ...