Physics Colloquium
The origins of Earth previous moons and why is the moon made out of cheese
Hagai Perets
Abstract
Earth moon had attracted human attention since the earliest times in human history Its origins have been debated as early as the earliest mythologies in all human cultures and are still strongly debated to this day The return of Moon material by the Apollo missions have shed new light and new puzzles regarding its origin In particular it was found that Earth isotopic composition is essentially identical to the Earth giving rise to many open questions of how that