Earth, Moon, Sun

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Across
  1. 2. to move in a circular or nearly circular path around something else
  2. 4. the phase of the moon when you see all of the lighted side
  3. 6. the phase of the moon when the lighted side has almost disappeared
  4. 8. a real or imaginary line that a spinning object turns around
Down
  1. 1. the phase of the moon that is almost full
  2. 3. spins
  3. 5. the phase of the moon when you can't see the lighted half
  4. 6. a hollow area, or pit, in the ground
  5. 7. the path a revolving object moves along