| 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 came to be. I will review the various models suggested for the origin of the Moon, their difficulties and successes, and then focus on new results that may resolve some the main challenges to the suggested models. I will also discuss the highly likely possibility that the Earth have had previous moons prior to the Moon we see today. If time permits I'll discuss other moons in the Solar system. |
