Ganimede

The Discovery of the Four Galilean Moons

The Discovery of the Four Galilean Moons

On January 7, 1610, physicist and astronomer Galileo Galilei turned his new telescope to the nocturnal sky to watch the planet Jupiter and discovered the eponymous four moons of Jupiter, Io, Europa, Ganimede, and Callisto.[1,2] The Telescope Based only on uncertain descriptions of the first practical telescope which the Dutch lens maker Hans Lippershey [3] tried to patent in the Netherlands in 1608, Galileo Galilei, in the following year was able to improve…
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