For decades, Pluto was celebrated as the ninth planet of our solar system. However, in 2006, the International Astronomical ...

This hypothesis was nicknamed the “Big Whack.” Tthe dwarf planet Pluto (R) and Charon are shown July 11, 2015. (Photo by NASA/JHUAPL/SWRI via Getty ... [+] Images) Researchers studying Pluto ...

In August 2006, the International Astronomical Union made the controversial, but correct, decision to demote Pluto from its ...

This story appears in the July 2015 issue of National Geographic magazine. Small, cold, and absurdly far away, Pluto has always been selfish with its secrets. Since its discovery in 1930 ...

Planitia structure on its surface. Ever since NASA's New Horizons sent back the first-ever photos of Pluto in 2015, the dwarf planet's mysterious heart-shaped region has puzzled scientists.

New research suggests Pluto may have had a “kiss” with its largest moon billions of years ago in a harmless collision. The report, published in “Nature Geoscience,” describes how the ...

An curved arrow pointing right. NASA's New Horizons spacecraft took us to Pluto for the first time in July 2015. Scientists are astonished by the incredible features they've observed on the dwarf ...

Pluto has an atmosphere, albeit sparse, as confirmed by the New Horizons mission that whizzed past in 2015. One advantage of the minor planet's relatively weak gravity is that its low-density ...

Pluto is too far away from Earth to be seen with ... That was until NASA's 'New Horizons' probe arrived in 2015 and transformed our understanding of this distant, enigmatic body.

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