Earth, Moon, and Sun

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Across
  1. 3. earth is a new moon phase then the view from the moon
  2. 6. circular path of a smaller object around a larger object
  3. 7. how does light from the sun travel?
  4. 10. the relative size of things
  5. 11. How much of the Moon can we see from Earth
  6. 12. the star that us the main source of light
  7. 15. the border between light and dark on the moon
Down
  1. 1. A planet outside our solar system
  2. 2. time it takes for one planet to make 1 orbit around star
  3. 4. the shape of the illuminated part of the moon
  4. 5. something we observe to be similar over and over again
  5. 8. to shine light on an object to make it visible
  6. 9. when the Moon is completely dark
  7. 13. A moon outside our solar system
  8. 14. an attractive force between all objects that have mass.