Inside Dwarf Planet Pluto

Dwarf planet Pluto was discovered in 1930 and was once considered to be the ninth planet from the sun in Earth’s solar system.
Discovered in 1930 and once considered a major planet, Pluto was reclassified as a dwarf planet in 2006.  Pluto is sometimes
considered a double planet system because its largest  moon, Charon, is about half Pluto’s size. It takes Pluto 248 years to orbit the Sun.
 
A temporary nitrogen-methane atmosphere forms when Pluto's surface ice thaws, when Pluto is closest to the sun.
 
Pluto’s rocky core is probably surrounded by a mantle of ice, with methane and nitrogen frost coating its surface. 
 
Embed: Paste the code below into your site.
More from Space.com