Astronomy Answers: From the Astronomical Dictionary

Astronomy Answers
From the Astronomical Dictionary


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Dione

A moon of 1125 km diameter at about 377,420 km from the planet Saturn. The gravity at its surface is about 0.0236 times as strong as on Earth. The moon goes once around its planet in about 65.7 hours. The moon was discovered in 1684. Also called SIV (Saturn four).