Sun/Earth/Moon/2012DA14 Simulator

Push the Start button to start/restart the simulation from the beginning (Feb 1, 2013).
Push Pause to pause the simulation. Push Play to resume a paused simulation.
Push Show Trails to show where each planet has been (only works correctly if "center on" is set to 0).
Push + to zoom in. Push - to zoom out.

You can choose one of two different integration methods: Midpoint (Leapfrog) and Hermite.
The accuracy of the simulation is determined by the step size dt.
the warp parameter controls the speed of the simulation (without compromising quality).