eli5: How do things get into orbit?

Question

I know how they stay in orbit but how do random planets and stuff have the exact speed needed to get to orbit? Is it pure chance or some phenomenon that speds them up or slows them down?

In: 0

Answer 1

Planets from from the proto planetary disc, the equivalent to the rings around Jupiter so they are already in orbit when they clump together to form a planet. https://youtu.be/Yhtr2hbg9Rs