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Incredible underwater photo of a Polar bear

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Pluto, formal designation 134340 Pluto, is the second-most-massive known dwarf planet in the Solar System (after Eris) and the tenth-most-massive body observed directly orbiting the Sun. Originally classified as the ninth planet from the Sun, Pluto was recategorized as a dwarf planet and plutoid due to the discovery that it is one of several large bodies within the newly charted Kuiper belt.

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Pluto’s Big Moon Charon Reveals a Colorful and Violent History

Pluto and it's moon Charon: NASA’s New Horizons spacecraft has returned the best color and the highest resolution images yet of Pluto’s largest moon, Charon – and these pictures show a surprisingly complex and violent history.

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spaceplasma: “ Planets of Our Solar System “ Our solar system officially has eight planets and one star: the Sun. The discovery of an object larger than Pluto in 2005 rekindled the debate over whether...

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Hubble’s discovery of two new moons of Pluto, mapping seasonal changes to Pluto’s surface. Hubble discovery that Eris is 27 percent more massive than Pluto helped demote Pluto to dwarf planet status.

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