Roberts stars crossword

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Across
  1. 3. amount of time for international space station to orbit the earth
  2. 4. space telescope
  3. 7. space craft sent up in 1977
  4. 8. a planet that can grow vegetation
  5. 9. the distance of light traveling in a year
  6. 12. how much weight something has
  7. 15. a triple star system
  8. 17. can form into a star
  9. 18. star link
  10. 19. what all the stars and plants are in
  11. 20. what we live on
  12. 22. the earth going around the sun
Down
  1. 1. a a group of stars that form something
  2. 2. name of our galaxy
  3. 5. the first element on the periodic table
  4. 6. multi nation space station
  5. 10. to remain unchanged
  6. 11. a well knew power sports company
  7. 13. a white dot in the sky
  8. 14. a constellation
  9. 16. a blown up star that that light cant go through
  10. 21. a space further than Neptune's orbit