Written as a proof of concept before writing a better(faster) version in C.
out.mp4 - Consists of a single black hole, in which all other stars circle. Due to a bug, only the gravity between the stars and the black hole was calculated.
out2.mp4 - All stars weigh the same, but only the gravity with a specific star is calculated (again, a bug.)
out3.mp4 - The first simulation that properly handles gravitional forces between all stars at once.
out5-overnight.mp4 - As the name implies, this ran for about 8 hours overnight. This is much, much slower than the C version! It shows the time in the top left of the video.
In general, this code is pretty spaghetti-like, since it went through many different changes without refactoring. Sorry!