Ooops, no java?
This applet numerically integrates the exact Newtonian form of the equations of motion for test particles in Newtonian orbits (red), Schwarzschild (green), and Gullstrand-Painleve (blue) orbiting around a black hole. For an explanation of the equations of motion, see The Force of Gravity in Schwarzschild and Gullstrand-Painleve Coordinates, Carl Brannen, (2009, 6 pages LaTeX).
Source code: GravSim.java


HTML made with Bluefish HTML editor.