Earth's Place in Space

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Across
  1. 4. the way something appears or seems to move
  2. 7. our galaxy
  3. 11. shape of the Milky Way galaxy
  4. 12. farthest from the sun
  5. 14. third planet from the sun
  6. 15. belt of space rocks between inner and outer planets
  7. 18. a large,round object in space that orbits a star
  8. 19. travels around the center of the Milky Way
  9. 20. closest planet to the sun
  10. 21. new stars appear to the
Down
  1. 1. ancient Romans called our galaxy
  2. 2. consists of the sun and all the objects around it
  3. 3. contains billions of stars, dust and gas held together by gravity
  4. 5. the arm our solar system is in
  5. 6. between Mercury and Earth
  6. 8. ancient Greeks called our galaxy
  7. 9. stars in the northern sky seem to circle around
  8. 10. each night the position of the stars shifts slighty
  9. 12. also known as Polaris
  10. 13. seventh planet from the sun
  11. 16. between Jupiter and Uranus
  12. 17. first outer planet
  13. 20. last inner planet