The Universe

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Across
  1. 5. Natural satellite orbiting a planet
  2. 6. Composed or rock and dust
  3. 8. All of space and everything in it
  4. 9. Meteoroid that survives and hits Earth's surface
  5. 12. The distance light travels in one year
  6. 13. Vast, distant shell of icy bodies surrounding the solar system
  7. 15. The first closest planet from our sun
  8. 16. Round, orbits the Sun, but hasn't cleared its orbital path.
  9. 17. The second biggest planet in our solar system
Down
  1. 1. A celestial object that has a nucleus of ice and dust
  2. 2. The biggest planet in our solar system
  3. 3. Region beyond Neptune with icy objects and dwarf planets
  4. 4. A system of billions or millions of stars pulled together by gravity
  5. 5. Small rock or metal in space
  6. 7. Our galaxy is
  7. 8. The third jovian planet away from our sun
  8. 10. universal expansion and hubbles law
  9. 11. The colossal, explosive death of a star
  10. 14. Cloud of gas and dust
  11. 15. The fourth closest planet from our sun: