Star crossword

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Across
  1. 2. A group of stars that are imagined to represent something
  2. 6. unit of distance traveled in a year
  3. 7. Space probe launched to see the outer solar system
  4. 9. what all the planets are floating around in
  5. 13. The simplest and most abundant element in the universe
  6. 14. regions in space where matter is in a small volume causing a gravitational pull so intense nothing can escape
  7. 15. the neighboring galaxy visible in our night sky
  8. 16. a vast, doughnut-shaped region of icy debris
  9. 17. A gravitational force that holds you to the ground keeping things from floating
  10. 18. the planet we live on
  11. 19. a space telescope
  12. 20. A constellation in our night sky
  13. 22. this amount equals to 1 hour and 30 minutes
Down
  1. 1. how heavy an object is
  2. 3. ISS
  3. 4. A specific part in our galaxy
  4. 5. the sun and moon do this creating day and night
  5. 8. the closest star system to our solar system
  6. 10. an objects resistance to change/movement
  7. 11. a giant cloud of dust and gas in space
  8. 12. An object floating around in space (we live on one of these)
  9. 21. An object orbiting earth