Dark markings along the northern edge of Sputnik Planitia, the vast nitrogen-ice glacier that dominates one face of Pluto, are best explained by liquid nitrogen that recently reached the surface, ...

Pluto’s hazy, multilayered atmosphere is thinning out as it enters the coldest part of the Plutonian year. Above, the ...

Pluto’s atmosphere may finally be thinning as it moves farther from the sun, with observations suggesting atmospheric pressure has fallen by as much as 16%.

Pluto has long been one of the most controversial objects in our Solar System. For decades it proudly held the title of the ...

Pluto’s dark side has come into dim view, thanks to the light of the dwarf planet’s moon. When NASA’s New Horizons spacecraft flew past Pluto in 2015, almost all the images of the dwarf planet’s ...

Add Yahoo as a preferred source to see more of our stories on Google. Scientists have called for Pluto to be classified as a planet again following a new study into planetary science. Pluto was ...

The methane-capped mountains of Pluto’s Cthulhu region. False color images, in purple, show methane across the region correlates with the snow caps. Gazing at Pluto’s Cthulhu mountain range from space ...

Nearly 11 years after NASA’s New Horizons spacecraft made humanity’s first close flyby of Pluto, scientists have returned to its images and identified something that had previously escaped ...