A new proposition suggests that when the moon formed from the impact of an asteroid with the earth 4.5 billion years ago, that it wasn't just one moon formed, but two.
Why would anyone think that? There is a difference between the near and far sides of the moon. The two sides have different terrains, a different crust thickness and different amounts of so called KREEP (potassium (K), rare earth elements (REE), phosporous (P)) elements.
For details see Nature: Early Earth may have had two moons - Richard Lovett
No comments:
Post a Comment