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Questions regarding the action of or an object rotating along an axis.

17 votes
3 answers
5k views

If planets are ellipsoids why don't we have 3 diameters?

We know that each ellipsoid has 3 diameters named $2a$, $2b$, and $2c$. The Earth and all planets, in general, are ellipsoids (Saturn is the best example because it's the most oblate planet in the sol …
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4 votes
1 answer
135 views

The orbital period of Jupiter and Europa billions of years later

Also, what will the side-real rotation period be for the two objects? Is there a way to calculate them? …
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