nprofile1qy2hwumn8ghj7un9d3shjtnddaehgu3wwp6kyqpqdpcm4gtfv09u6rgv3v0kfp0pwq02mfcax7qljll2373npf90g74qn8cnse (nprofile…cnse) nprofile1qy2hwumn8ghj7un9d3shjtnddaehgu3wwp6kyqpqmh3d923n7kss07fsdqynn70zwex6e3ju4z7j254ua3gmkcsr93ysr7mqrg (nprofile…mqrg) - yes, this claim is on Wikipedia, and it puzzled me:
"Cassini believed that a planet orbiting around another body traveled on one of these ovals, with the body it orbited around at one focus of the oval.[2]"
where [2] is
Cohen, I. Bernard (1962). "Leibniz on elliptical orbits: as seen in his correspondence with the Académie Royale des Sciences in 1700". Journal of the History of Medicine and Allied Sciences. 17 (1): 72–82. doi:10.1093/jhmas/xvii.1.72.
and now I'm going to read it here:
https://www.jstor.org/stable/24620858
It's about a guy named Fontenelle telling Leibniz that Cassini has abandoned Kepler's ellipses. I don't see anything about *why* Cassini did this. It mentions that Leibniz might have liked this because it could invalidate Newton's mechanics, but it doesn't provide any evidence that Leibniz actually *did*. So, fairly mysterious.