Science, Weapons and Space (Use dashes instead of spaces)

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Across
  1. 2. A celestial body that orbits a planet, dwarf planet, or even an asteroid
  2. 5. Water
  3. 6. A self-propelled weapon designed to deliver an explosive warhead to a distant target
  4. 8. Lumi has them
  5. 10. A massive, gravitationally bound system composed of stars, stellar remnants, gas, dust, and dark matter
  6. 13. A celestial body that orbits a star, is massive enough for its gravity to pull it into a nearly round shape, and has cleared its orbital path of other debris
  7. 15. Australians use this in WW2
  8. 17. A long ranged rifle
  9. 19. A rocky, airless remnant from the early formation of our solar system
  10. 20. Use in the kitchen(Normally)
Down
  1. 1. A hypothetical structure connecting two distant points in spacetime
  2. 2. The bright streak of light we see in the sky when a small piece of space rock, called a meteoroid, enters Earth's atmosphere and burns up due to friction
  3. 3. Police normally carry this around
  4. 4. A celestial object made of ice, dust, and frozen gases that orbits the Sun
  5. 7. What symbol on the periodic table equals 100
  6. 9. The sun is one
  7. 11. Used for chopping wood
  8. 12. Shoots fire
  9. 14. Poseidon has one
  10. 16. Shoots arrows
  11. 18. Is there an end to the universe