GravSim
GravSim is a free gravitational simulator which visually reproduces a two dimensional view of gravitational effects on celestial bodies.
How To Use: Download gravsim.class and put it ina directory called "class" (that you create) below your HTML directory. See parameter info below.
Java Source: gravsim.java
HTML Source:
<applet codebase="class" code="gravsim.class" width="400" height="350">
</applet>
Author: Luke Andrews-Hakken
Homepage: http://newmedia.slc.edu/~luke/astro
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