MulBurns Crossword

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Across
  1. 3. The red planet
  2. 6. The path one object takes around another in space
  3. 7. A large body that orbits a star
  4. 10. The force that keeps planets in orbit
  5. 11. A machine that launches into space
  6. 12. Earth's natural satellite
  7. 13. The star at the center of our solar system
Down
  1. 1. The U.S. agency for space exploration
  2. 2. A tool used to look at stars and planets
  3. 4. A planet with rings
  4. 5. An icy space object with a glowing tail
  5. 8. A person who travels into space
  6. 9. A giant system of stars (like the Milky Way)