An apparatus to demonstrate the motion of Jupiter's satellites in Putnam Gallery, thought to be Dutch origin circa 1750, used by John Winthrop to teach astronomy at Harvard, on display at the Putnam Gallery in the Harvard Science Center
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{{Information |Description={{location dec|42.37650718519262|-71.11607372760773}} An apparatus to demonstrate the motion of Jupiter's satellites in Putnam Gallery, thought to be Dutch origin circa 1750, used by w:John Winthrop (1714–1779) to teach a