How the Moon Takes Shape

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Across
  1. 3. turns around on an axis
  2. 4. studies the stars
  3. 6. exact or particular
  4. 7. is a curve that is wider in the middle and tapered at the ends
Down
  1. 1. are different stages of the moon
  2. 2. a number of similar things coming on after another
  3. 5. thin and pointed piece