Space

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Across
  1. 2. Fine grains of fluff or rock powder
  2. 4. A repeated line of things
  3. 5. The sun is one
  4. 9. How many years it takes for light to reach
  5. 10. A group of stars
  6. 11. A detachable "rocket" on NASA's space shuttle rocket
  7. 13. Light formed by cosmic dust
  8. 15. A drawing to label something
  9. 18. A smaller asteroid
  10. 19. When celestial bodies meet it causes this
  11. 20. How big something is, compared to others
  12. 23. The science of studying planets
  13. 24. What something radiates
  14. 25. A small satelite
  15. 26. A type of orbit
Down
  1. 1. What Issac Newton discovered
  2. 3. A very large group of galaxies
  3. 4. A very large rock in space
  4. 6. A big probe
  5. 7. From space
  6. 8. Which direction and tilt that a planet revolves around
  7. 12. A un flammable gas used to make hydro power
  8. 14. What the air is like
  9. 16. A very large group of solar systems
  10. 17. When a planet revolves around the sun once.
  11. 18. What comes out of a cow's bottom that is a gas
  12. 21. A very small rock from space
  13. 22. A set of things working together
  14. 27. What killed "all" of the Dinosaurs