Lauryns cross word puzzle.

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Across
  1. 2. earth, Venus, Saturn, and mars are what?
  2. 6. the simplest element
  3. 9. specks in the sky that shine at night
  4. 10. a fast light travels
  5. 12. when we connect stars together we get ______.
  6. 14. a system of stars
  7. 16. how much stuff is in something
  8. 19. a region of the solar system beyond Neptune.
  9. 20. this object can be seen with no city lights, and it contains our solar system
  10. 21. a space program that uses space X technology
  11. 22. an aircraft hat was launched in 1977
  12. 23. the thing keeping everything held together
Down
  1. 1. a space telescope
  2. 3. our closest neighboring star system
  3. 4. he tendency of an object to resist changes in its state of motion
  4. 5. an aircraft that orbits around celestial bodies.
  5. 7. our planets _____ the sun
  6. 8. the ISS completes one orbit in ______.
  7. 11. An object in space that sucks up anything that get close to it
  8. 13. the planet we live on
  9. 15. a large cloud in space that contains of dust and gas
  10. 17. closest major galaxy to the milkyway
  11. 18. the ISS stands for what?