Back in cegep I built an accuratedly scaled model of our solar system using VRML (I don't have the file now, so don't ask). Something that surprised me, and will probably surprise a lot of people, is that the planets are so far from the sun that if you ever build a scale model of the solar system, you won't be able to actually see anything.

Maybe an explanation is in order: The average distance between Pluto and the Sun is about 5'913'520'000 kilometers. The diameter of the sun is 1'391'000 kilometers. If you scale the Solar System so that it fits on your 19 inch monitor (say, by making the distance between the Sun and Pluto be 48 centimeters apart), the sun would have to be about 0.11 millimeters. Unless you're running at some ungodly high resolution, like 4400 by 3300 or something, that's less than 1 pixel in size. And the Sun is the biggest object in our solar system, so forget seeing anything as small as a planet.