Orbital simulator. Press the flag to start the simulation, space bar to pause and again to resume. "a" key will add "deltaV", as a percent of velocity determined by the slider. P toggle pen up and pen down to show the orbit. "e" will erase the orbit path.
This is a legitimate simulation of the sun/earth system using the orbital parameters of the system; however units were changed to better scale in scratch. Mass is measured in earth-masses, distance in astronomical units, and time in years. The position plotted and position calculated vary by a factor of 100, which is why you see 100s here and there.
