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.

Phobos

A moon of 22 km diameter at about 9,380 km from the planet Mars. The gravity at its surface is about 0.0006 times as strong as on Earth. The moon goes once around its planet in about 7.7 hours. The moon was discovered in 1877. Also called MI (Mars one).