Space Crossword Puzzle

12345678910
Across
  1. 1. system of millions or billions of stars
  2. 4. cosmic dust of small particles
  3. 7. collection of 8 planets
  4. 9. celestial object of gases, rock, and dust
  5. 10. curved path of a celestial body
Down
  1. 2. person who space travels
  2. 3. force that attracts a body toward center of earth
  3. 5. large astronomical body
  4. 6. relating to the universe or cosmos
  5. 8. orbiting the earth