Planets crossword

1234567891011
Across
  1. 2. Smallest planet in our 'updated' solar system
  2. 4. The idea that planets orbit around the sun
  3. 7. One day on this planet equals 17.24 earth hours
  4. 9. The planet that has rings around it
  5. 11. Invented the telescope and proved that the heavens are not perfect
Down
  1. 1. Has the shortest day
  2. 2. The galaxy that contains our solar system
  3. 3. The hottest planet
  4. 5. Proposed the idea of the sun-centered model
  5. 6. The coldest planet
  6. 8. After earth it is the most habitable planet
  7. 10. National Aeronautics and Space Administration