> how much is at that height? Not a lot. Most of the debris is located at much lower orbits. The total number of satellites in GEO is mostly limited by the ang

> how much is at that height? Not a lot. Most of the debris is located at much lower orbits. The total number of satellites in GEO is mostly limited by the angular resolution of customers' antennas (= dish size). Also, it costs a lot to launch something to GEO, and it's in the middle of the outer Van Allen belt (a tough environment, radiation hardening is an absolute requirement). So it's sparsely populated with large expensive spacecraft the size of a bus, orbiting Earth at predictable intervals. Dead stuff drifts away since it's not a stable orbit. > I wonder if there are simulators that can predict the likelihood of collisions. Most gravitational dynamics frameworks or standalone software will do. > how common are meteorites and things coming from space? And what are the chances of being hit by those? Quite common, but the near-Earth space is really big, and GEO in particular is sparse enough for the strikes to be rare. >I am guessing a large object like the space station has a bigger chance of being hit by something. Yes, and both Mir and ISS were hit many times.