The formation of the Moon - Ο σχηματισμός του φεγγαριού
A simulation of the impact that may have formed the Moon.
For those people confused: This is a simulation of a larger impactor, about the size of Mars, impacting the early earth. The different colours correspond to different materials and layers within the earth and the impactor. It shows how the impact threw up a lot of one particular layer into space (the yellow colour in this picture) which explains the homogenous nature of the moon in comparison to Earth. The stuff that is in space towards the end of the animation would then coalesce to form a single body, which is a fairly well understood process.
Credit to Robin. M. Canup