This Application Contains 4 Simulations. - Gravity Simulator - Solar System Simulation - Sun And Planets Sizes - General Relativity Visualization Solar System Simulation In this application you can change the mass of any Planet, to observe that how variation in the mass of one Planet will effect the motion of other planets, and how the orbits of planets shifts. Gravity Simulator In this application you can add planets with different mass, density and initial speed, you can also add stars(sun