[SOLVED] What keeps the stars apart? I have often looked to the night sky and wondered what keeps all these zillions of stars apart. Centrifuge I feel is not adequate alone. Expansion of the universe doesn't work either All the stars are attractive with their inherant gravities and yet there seem to be very rare collisions given the vast number of stars involved. I once thought that maybe it was the light they emit that acts as some sort of repulsion and as theorised if a star stops shining it collapses and generates a huge amount of attraction. Could it be that the light is in some way an inverse gravity that acts as a repeller on other astral bodies. I have always held to the premise that what happens only happens because it HAS to happen. So, what has to be happening to keep the stars apart I wonder? Any ideas?