The Solar System Planets - Crossword Style

123456789
Across
  1. 3. It used to be known as the 9th planet in the solar system
  2. 6. "Voyager 2" is the only spacecraft to have visited this planet
  3. 9. A year here is 84 years on Earth
Down
  1. 1. It is the 2nd largest planet in the solar system
  2. 2. A day here is only 10 hours
  3. 4. A year here is only 88 days on Earth
  4. 5. The largest volcano in the solar system is here
  5. 7. It is the only known object in the universe to harbor life
  6. 8. It is also known as "Earth's twin"