The drawf planet Pluto was named by the suggestion of an 11 year old, Venetia Burney from Oxford England. Her suggestion was voted on unanimously by the observatory that discovered the dwarf planet.
Venus is the hottest planet in our solar system. The surface temperature on Venus is a burning 461.85 °C (863.33 °F). On Pluto it is so cold that liquid nitrogen turns to solid! Pluto's estimated surface temperature is around -228°C (-378°F).