The Face of the Moon

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Riccioli's assignment of some of the brightest craters to Copernicans--Kepler, Galileo, Lansberg, and Copernicus himself--has always been a bit of a puzzle, since as a Jesuit, Riccioli staunchly upheld the doctrine of a fixed and central earth. He claimed to have flung the heliocentrists into the Sea of Storms (Oceanus Procellarum), but some wonder if he did not reveal here a secret fondness for the Copernican doctrine, especially since he named two nearby craters Grimaldus and Ricciolus, while other Jesuit astronomers were assigned to craters in the south, surrounding Tycho.

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