Solar System

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Across
  1. 5. the near side of the moon is dark, and you cannot see it
  2. 6. an increasing amount of the moon's near side is sunlit
Down
  1. 1. a decreasing amount of the moon's near side is sunlit
  2. 2. half the moon's near side is sunlit
  3. 3. to move in a path around another object
  4. 4. to turn on an axis