Astronomy Answers: From the Astronomical Dictionary

Astronomy Answers
From the Astronomical Dictionary

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The description of the word you requested from the astronomical dictionary is given below.


A moon of 3643 km diameter at about 421,800 km from the planet Jupiter. The gravity at its surface is about 0.1832 times as strong as on Earth. The moon goes once around its planet in about 42.5 hours. The moon was discovered in 1610. Also called JI (Jupiter one).