This is a very nice, graphical, facile gallery of recently discovered stable orbits for 3 unit point masses, solutions of the 3-body problem:<div><a href="http://suki.ipb.ac.rs/3body/">http://suki.ipb.ac.rs/3body/</a></div>
<div>You can just click on a thumbnail; my favorite so far is "dragonfly".</div><div>The "shape spheres" are a representation of the solution where the coordinates on the sphere depend on the distances between masses, instead of the locations of the masses; the "info" thumbnail explains all that. The group mentioned is a homotopy group on the shape sphere, around "punctures" where the orbit is degenerate because two point masses collide. But the "physical" representation is just what you expect, curves showing the orbits in xyz space.</div>
<div><br></div><div>Anyway, I mention this as an example of why mathematicians don't believe in idle CPU time. We don't need no stinkin' data, we make our own data.</div><div><br></div><div>Peter</div>