Sun, moon, and Earth

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Across
  1. 3. The thing that we see at night
  2. 5. The moon moves and has phases that repeat which makes a
  3. 6. The exact size of some thing
  4. 7. What the sun does to the moon at night
Down
  1. 1. The thing that lights up the earth
  2. 2. Gives you a idea of it by showing you it
  3. 3. What first quarter and full moon are
  4. 4. What the moon does to go around the earth