Powers of Ten

At Secrets Worlds: The Universe Within there is a great Java Applet that zooms in and out from 10 million light years from earth to the level of quarks inside an atom on earth. You can have it run automatically both in and out, or you can manually click from one level of magnification to the next.

It's fun to watch and also a GREAT way to get an idea of scientific notation, exponents, and powers of ten.

Image above by Chuck Higgins (at www.higginsc.com/Deepsky/deepsky.htm)