For Your Astronomers: ScalePlanets [Google Chrome Experiment]
An interactive model of the planets and moons in our solar system. Each planet is to scale relative to the others, along with the sun.
Instructions: Use the mouse to move around the planets to view from any angle. Move closer or further from the planets using the scroll wheel. Planets can be reordered using the thumbnails at the top and shown/hidden by using the check boxes.
[Distances not to scale]