Pluto is almost 6 billion km away from the Sun. So you could say it’s a bit cold here. Lots of clever people have argued about if Pluto is a planet or not. At the moment it is a dwarf planet. 

Joe's Solar System Walk
  1. The Sun
  2. Mercury
  3. Venus
  4. Earth
  5. Jupiter
  6. Saturn
  7. Uranus
  8. Neptune
  9. Pluto