Simultaneously cooling Pluto while energizing atmospheric molecules to allow them to escape into space, Pluto's haze plays a key role in the planet's energy balance.

A possible cousin of Pluto seems to be circling the far reaches of the solar system. The dwarf planet candidate 2017 OF201 travels in a superwide orbit, with the sun relatively near one end of its ...

A new dwarf planet, discovered beyond Neptune and described as Pluto's 'cousin,' could void the hypothesis of a Planet X in our solar system.

A new dwarf planet, discovered beyond Neptune and described as Pluto's 'cousin,' could void the hypothesis of a Planet X in our solar system.

Pluto was discovered in 1930 in Arizona, but in 2006 scientists decided to cut Pluto from the planetary line up. Here is why Pluto isn't a planet.

Almost 10 years ago, a NASA spacecraft was able to take several photos of Pluto, known for decades as a planet before it was reclassified as a dwarf planet in 2006.

Browse 4,300+ pluto dwarf planet stock illustrations and vector graphics available royalty-free, or start a new search to explore more great stock images and vector art.

Pluto was reclassified from a planet to a dwarf planet by the International Astronomical Union because it did not meet all three criteria of their updated definition of a planet.

NASA image of changing faces of Pluto Two different versions of an image of Pluto's haze layers Pluto system: An artist's concept of the dwarf planet being orbited by its moons.

5 beautiful images of dwarf planet Pluto captured by NASAIn September, NASA's New Horizons team released a stunning but incomplete image of Pluto's crescent.

Pluto was demoted from a planet to a dwarf planet in 2006. So why is its status still so controversial today?