Astronomy Applets

I've written a small number of JAVA astronomy applets that I used in one class or another over the years. Right now, I only have one online, but I'll try to find the others and get them online as well.

These applets require the JAVA plug-in. If you don't have it, you can get it from Sun.

Spiral Galaxy Rotator

A very astute student who was in my first introductor astronomy class asked, when I told them about the rotation curve of Spiral Galaxies, "why don't the spiral arms wrap up"? I wrote this applet in an attempt to demonstrate to those who couldn't see it why this would seem to be an issue.