How was the mass of the moon first calculated? How do we measure it now?

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    $\begingroup$ You may be interested in History of Science and Mathematics $\endgroup$ – Kyle Kanos Jan 4 '20 at 18:57
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    $\begingroup$ Try rephrasing the question like this: How was the mass of the moon first calculated? When was it done? And it still may be a better fit in History of Science and Mathematics. $\endgroup$ – mmesser314 Jan 4 '20 at 19:15
  • $\begingroup$ So if this is now the question, who is asking it? $\endgroup$ – my2cts Jan 4 '20 at 19:41
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    $\begingroup$ Measuring the Moon's mass $\endgroup$ – Keith McClary Jan 6 '20 at 0:33

In the history of astronomy there was no correct concept of masses before Newton. The Greeks had found reasonably accurate volumes of the Earth and Moon, but masses were unkwnown. The planetary mass determination relies on Kepler's third law. Newton indirectly measured the mass of the Moon, trying to estimate the ratio between the solar and lunar masses looking at sea tides. I suggest this lecture to clarify any doubts (in particular the first two pages).



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