Here's a simulation of a (rather unstable) Earth-moon-moon system.  

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<applet CODE=moons.class 
WIDTH=800 HEIGHT=550>
<strong>
[Oops, your browser will not display java applets.]
</strong>
</applet>


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See also my <a href="manymoons.html">manymoons applet</a>, and
my <a href="spacetag.html">spacetag game</a>, and
my <a href="index.html">other applets</a>.


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