The Earth-Sun-Moon System

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Across
  1. 4. to spin around in one place
  2. 7. is the lightest part of a shadow
  3. 9. visible fraction of sunlit moon decreases
  4. 11. the right half of the moon appears fully lit
  5. 12. shadow appears when celestial body falls on ...
  6. 13. earth is between the moon and sun
  7. 14. a thin silver of moon becomes seen & grows
Down
  1. 1. moon is between Earth and the sun
  2. 2. the left half of the moon appears fully lit
  3. 3. change in the sunlit area of one celestial body
  4. 5. darkest part of a shadow
  5. 6. sunlit fraction of the moon that is seen
  6. 8. the course in which something is moving
  7. 9. sunlit fraction of the moon that diminishes
  8. 10. path body follows as it travels around another body