Astronomy Answers: From the Astronomical Dictionary

# Astronomy AnswersFrom the Astronomical Dictionary

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

## Jj

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Janus

A moon of 178 km diameter at about 151,500 km from the planet Saturn. The gravity at its surface is about 0.0016 times as strong as on Earth. The moon goes once around its planet in about 16.7 hours. The moon was discovered in 1966. Also called SX (Saturn ten). Its provisional designation was S/1980 S1.