[ExI] geometry of solar system

[William Flynn Wallace]

"Either the earth goes around the sun or it doesn't."

Is that true?  According to what I read, you can pick any point, even
Pluto, and consider it to be the center, although that makes the geometric
math a nightmare.  So we take the sun as the center just to make the math
easier.  Right?  Question ditto for galaxy.

bill w
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