Space Crossword

12345678910
Across
  1. 3. The study of space
  2. 7. A giant cloud of dust and gas in space
  3. 8. A giant mass of whirling water and air
  4. 9. A vehicle that is able to go to space
  5. 10. The largest planet in our solar system
Down
  1. 1. A person who travels into space
  2. 2. A term for a Russian or Soviet astronaut
  3. 4. A piece of rock that orbits the sun
  4. 5. An independent agency of the U.S. government
  5. 6. The planet closest to the sun