New Supercomputer Simulation Sheds Light on Moon's Origin

A new NASA and Durham University simulation puts forth a
different theory of the Moon's origin - the Moon may have
formed in a matter of hours, when material from the Earth and
a Mars sized-body were launched directly into orbit after the
impact. The simulations used in this research are some of the
most detailed of their kind, operating at the highest resolution
of any simulation run to study the Moon's origins or other
giant impacts.