As someone else already commented, the leading theory since several decades (most other theories about the origin of Earth's moon became less plausible once we went to the moon and brought back moon rocks for analysis) is that Proto-Earth collided with a roughly Mars-sized object we're calling Theia. As a result, the material from both was mixed. Part of that mix of two (proto-)planets got ejected and formed the moon, while the rest formed the Earth (with smaller objects forming temporarily in unstable orbits and raining down as meteorites on both the Earth and the Moon).
I just wanted to leave this here (reddit.com) en
Yep, this is what the future of awards on Reddit looks like
Scientists discover huge, heat-emitting blob on the far side of the moon (livescience.com) en
Scientists have discovered an anomalous blob of heat on the far side of the moon....
Can I colour your arm plz (media.kbin.social) en