Science crossword puzzle

123456789
Across
  1. 2. the hottest planet in the solar system
  2. 4. The smallest planet in our solar system
  3. 6. the farthest planet from the sun
  4. 8. hot glowing ball of gas
  5. 9. the planet that rotates sideways
Down
  1. 1. the largest gas giant in our solar system
  2. 3. the planet known for its rings
  3. 5. the planet that scientists are studying also the fourth planet in order
  4. 7. the only planet know to sustain life in our solar system
  5. 8. A hot glowing ball of gas in which we orbit