Sam and Archie's Space Crossword

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Across
  1. 2. the system of stars
  2. 4. an imaginary line about which the earth rotates on
  3. 6. a cloud of gas and cosmic dust in outer space
  4. 8. the things that orbit the sun
  5. 10. a spacecraft that travels through space to collect science information
  6. 11. all existing matter and space considered as a whole
Down
  1. 1. a group of stars that form a shape
  2. 3. the distance that light travels in a year
  3. 5. the only star in the solar system
  4. 7. a rocky object that orbits the sun
  5. 9. a star rock consisting of dust and ice