Galilean satellites

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The four largest satellites of Jupiter, namely Io, Europa, Ganymede, and Callisto, which were discovered by Galileo in 1610. All four are easily visible in binoculars and small telescopes, and would be bright enough to be visible with the naked eye were it not for the glare of Jupiter. Some keen-sighted people have claimed to be able to see them without optical aid.


Subjects: Earth Sciences and Geography — Astronomy and Astrophysics.

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