Pluto

A picture of Pluto from space.

Discovered: It was discovered on Feb. 18, 1930 by Clyde Tombaugh.

Named after: It was named after the Roman god Pluto god of the underworld.

Temperature: 33 Kelvin

Diameter: 2,302 miles

Made of: 98% nitrogen ice, methane, and carbon monoxide

Can people live on Pluto?: No. First of all it is way too cold for people to live on it and it doesn't have oxygen in the air.