The planets

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Across
  1. 3. a small, rocky object that orbits the sun
  2. 5. National Aeronautics and Space Administration
  3. 7. a tool that allows astronomers to observe distant objects
  4. 8. a celestial body that orbits a star, has enough mass to be nearly round
  5. 9. seventh planet from the Sun.
  6. 11. scientific tests
Down
  1. 1. space rock that enters the earth
  2. 2. space travel
  3. 4. known as "red planet"
  4. 6. named after the Roman god of the sea.
  5. 10. A being from another planet