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I was thinking of a model from which you could compare differences or something. Even if there is no such thing as a perfect circle or sphere in real life, it's still a very useful concept because it provides a reference frame for observation.

And for docking, I was still thinking of the Kerbal Space Program. Not an actual physical spaceship.

PS. Also, the sun happens to be almost perfectly spherical.


In reply to Re^4: Irrational numbers by grondilu
in thread Irrational numbers by grondilu

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