Space Crossword

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Across
  1. 2. The physical universe beyond the earth's atmosphere
  2. 5. Keeps people safe in outer space
  3. 7. Our only natural sattelite
  4. 8. National Aeronautics and Space Admin
  5. 10. Synonym of Earth
Down
  1. 1. A celestial object revolving around the sun
  2. 2. A celestial object move in orbit around a star
  3. 3. Very low-mass stars
  4. 4. The basic unit of a chemical element
  5. 6. A small body resembling a planet
  6. 9. Class of asteriods