Astronomy Answers: From the Astronomical Dictionary

Astronomy Answers
From the Astronomical Dictionary

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A moon of 38 km diameter at about 23,939,000 km from the planet Jupiter. The gravity at its surface is about 0.0014 times as strong as on Earth. The moon goes once around its planet in about 756.5 days. The moon was discovered in 1914. Also called JIX (Jupiter nine).