fuckyeahspace:

You can watch the planets, moons and asteroids of our solar system move in proportional time with this awesome visualiser. Set the date and speed, as well as the model (Copernican or the pre-Renaissance Tychonian/geocentric model) and watch the physics happen. Unfortunately, it doesn’t depict the degradation of orbits over time, nor does the sun explode when set a few billion years in the future. Still cool, though!