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JupiterThis an image of Jupiter at its four largest moons, Io, Europa,
Callisto, and Ganymede, taken on October 3rd during an after class
observing session.
In 1610, Galileo discovered the four largest moons of Jupiter now collectively called the Galilean satellites. Galileo's discovery was the first observation of a celestial motion not apparently centered on the Earth. Arguing in favour of Copernicus' heliocentric theory of the motions of the planets, Galileo ran afoul of the Catholic Church leading to condemnation and house arrest for the rest of his life. [Photo by Graham Cree.]
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