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I was curious, because I have seen other sources call it an "unsolved problem." Is this problem impossible to solve, or is it just that no one has solved it yet?in astronomy, the problem of determining the motion of three celestial bodies moving under no influence other than that of their mutual gravitation. No general solution of this problem (or the more general problem involving more than three bodies) is possible.

And if it is impossible, where can I find a proof of the impossibility?

Thanks.