PlanetWerks is an astronomically accurate solar system simulator. Of all the widgets I've built I learned the absolute MOST from building this one. From 3D graphics techniques to implementing Kepler's Laws of Planetary Motion in code. There are a number of easter eggs hidden in this one! See if you can find them.
This widget requires a keyboard and mouse, as well as a desktop resolution screen, to deliver the best experience. Try out "Fullscreen" size under "Options"!