Gravity3D simulates the gravitational interaction between galaxies as they collide. It uses the gravity equation F=G*M1*M2/R^2 and assumes that orbiting stars have negligible mass compared to the parent stars/black holes. This software renders hundreds of thousands of stars in realtime.
Software Summary:
You can run Gravity3D on Windows operating systems. Gravity3D is a software product developed by Polygon Worlds and it is listed in the category. Gravity3D is a free software product and it is fully functional for an unlimited time although there may be other versions of this software product.