Big question: if the moon is a satellite formed from ejecta of earth, just how did it achieve orbital velocity, and not just splash back down?
We all know you can shoot a rocket straight up into space, but there is a bit more involved making it an orbiting satellite.
I saw a display about the moon at the Air and Space museum 4-5 years ago, and it pretty much said that nobody is really sure how it was formed, exactly. I think some of the moon rocks do match some earth rocks, but I annot recall exactly. If something rally big, traveling really fast crashed into the earth, yes, I think the result could achieve orbital velocity.