Glenn Chaple's Observing Basics: The Medicean stars
November 2009: Jupiter's four largest moons were evidence that not all celestial bodies orbit Earth.
Contributed by Glenn Chaple
Published:
September 28, 2009
 In drawings from Sidereus Nuncius, Galileo depicted Jupiter’s moons as asterisks. The Italian scientist discovered Io, Europa, and Callisto January 7, 1610, and Ganymede 6 days later.
Photo by Linda Hall Library of Science, Engineering, & Technology |
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