solar system cross word

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Across
  1. 3. collection of planets, moons, astroids,comets, dust, gas that prbit around the sun
  2. 6. how much matter an object contains
  3. 8. the motion of one body around another
  4. 9. a proportion between two sets
  5. 11. stars with gas and dust held together by gravitational force
  6. 12. the space between two points
Down
  1. 1. force where you cant see something physically touching
  2. 2. the turning of a planet on its axis
  3. 4. a period of unique climate
  4. 5. force that holds in the planets in orbit around the sun
  5. 7. the amount of moon you see given how much it is lit
  6. 10. the moon moves infront of the sun creating a shadow