Space

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Across
  1. 2. A constellation named after a Greek princess
  2. 4. A donut-shaped ring of objects around the sun
  3. 8. 6 trillion miles is equal to one of these
  4. 11. What will happen in 4.5 billion years?
  5. 15. What the dinosaurs go hit by
  6. 17. What is the sun
  7. 21. The best telescope in the world
  8. 23. A manmade satellite in space
  9. 26. The closest star system to Earth
  10. 27. An element as well as a planet
Down
  1. 1. An area with so much gravity even light can't escape it
  2. 3. Attracts objects toward each other
  3. 5. What we live on
  4. 6. Can either be planetary or stellar
  5. 7. Number 1 on the periodic table
  6. 9. These orbit the sun
  7. 10. An object's resistance to motion
  8. 11. The quantity of matter in an object
  9. 12. Pluto is now one of these
  10. 13. planets do this around the sun
  11. 14. An hour and a half in minutes
  12. 16. Spaceprobe launched by NASA
  13. 18. A machine in space that orbits things
  14. 19. A group of stars
  15. 20. The planet that got kicked out and turned into a dwarf planet
  16. 22. North Star
  17. 24. Milkyway is an example of this
  18. 25. The galaxy we live in