Space and other things.

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Across
  1. 2. National Aeronautics Space Administration
  2. 5. a very big hole in the ground
  3. 7. we use this to get to space
  4. 9. this is a dwarf planet
  5. 10. the 4th planet from the sun
  6. 12. the planet we live on
  7. 14. what keeps us in the ground
  8. 15. the hottest planet in the universe
  9. 16. this is made up of many galaxies and stars
  10. 17. ball of ice, dust and rock
Down
  1. 1. bright object in the sky
  2. 3. the topic we're studying right now
  3. 4. this sucks in all life and energy
  4. 6. the galaxy that we live in
  5. 7. an object that follows the earths orbit
  6. 8. people who go to space
  7. 9. there is 8 of these in our universe
  8. 11. 1st planet from the sun
  9. 13. the biggest planet in the universe