The Galaxy

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Across
  1. 3. a probe that was launched by NASA
  2. 6. a research facility in low Earth orbit
  3. 7. the amount of matter in one space
  4. 8. a element that stars use to create a nuclear fusion
  5. 11. A giant ball of dirt and water that we inhabit
  6. 13. Its what a star starts as
  7. 14. another name for north star
  8. 16. rest or in unchanging motion unless acted on by some outside force.
  9. 17. a place with such high gravity that nothing not even light can escape
  10. 18. a force that attracts us to earth
  11. 21. the distance light travels in one year
Down
  1. 1. the time it takes for the ISS to complete a orbit
  2. 2. a group of stars that to the Greeks and other civilizations believed there was pictures in them
  3. 4. a place of icy thinds beyond the orbit of Neptune
  4. 5. a constellation that is named after a princess in Greek mythology
  5. 8. a space telescope
  6. 9. A object we send into space to exchange waves or information
  7. 10. The Galaxy that our planet is in
  8. 12. closest star to the earth (except for the sun)
  9. 15. goes around the sun in a oval shape
  10. 18. a system of millions of stars and planets
  11. 19. A mass orbiting around a star
  12. 20. A big ball of gas floating in space