Planets!

123456789
Across
  1. 3. The largest planet
  2. 6. The centre of our solar system
  3. 7. The planet furtherest from the sun
  4. 8. The planet known for its rings
  5. 9. This planet is after Mercury
Down
  1. 1. The planet next to Earth
  2. 2. This planet begins with U
  3. 4. Now a dwarf planet
  4. 5. The planet closest to the sun