It is a well-known fact that if you drop a feather and a bowling ball at the same time, the bowling ball will hit the ground first. But this is only because it has less air resistance than the feather. So, if you are in a rocket that is in outer space (where there is no air), and you drop a bowling ball and a feather at the same time, which would hit the ground first?

Answer
Neither. Both of them will just float.