Solar System

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Across
  1. 3. meteor that reaches the atmosphere of earth
  2. 7. spinning on its axis
  3. 11. day and night are almost the same length
  4. 12. path in a circular motion
  5. 13. pattern of stars in the sky
  6. 14. can be inhabited
  7. 15. a group of billions of stars
  8. 17. force that pulls us down to earth
  9. 18. longest and shortest days of the year
Down
  1. 1. orbit around the sun
  2. 2. the sun and everything that orbits it
  3. 4. imaginary line that divides the earth
  4. 5. snowballs of frozen gases, rock and dust
  5. 6. small rocky objects orbiting the sun
  6. 8. study of space
  7. 9. one of two halves of the earth
  8. 10. used to express distance in space
  9. 13. pertaining to bodies or objects in space
  10. 16. all of space including galaxies