08. How long is a year on Mercury? (A K2S Question)
From The Space Library
One year on Mercury is 87 Earth days. Mercury moves so fast around the Sun that it only takes three Mercury days (axis spins) for two Mercury years (trips around the Sun) to pass!
Answer provided by Laura Peckyno & Robert Peckyno
Question and Answer extracted from the book Kids to Space - by Lonnie Schorer
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