Multiple choice

The revolution time of moon in days is _____.

  1. 27.5

  2. 28.5

  3. 29.5

  4. 30.2
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

29.5   The Moon spins once on its axis in about 27.3 days. This is the time between risings of some particular star above the lunar horizon from one place on the moon (any star, any place). That same place on the moon will experience sunrise once every 29.5 days (roughly), though this period is less constant, due to the Earth/Moon system's elliptical path around the Sun and other factors.

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