Planetary scientists have suspected for months the presence of water on Pluto in the form of towering ice mountains (shown below) — some of which rival Earth's Rocky Mountains in height. But it wasn't ...

When NASA’s New Horizons spacecraft flew by Pluto, Earth watched and celebrated. “The target didn’t disappoint,” says Principal Investigator S. Alan Stern. “It’s absolutely stunning.” And even though ...

New Horizons has sent back an image of Kerberos, the smallest moon in the Pluto system. Now, just a little more than three months after the Pluto flyby, we finally have a full “family portrait” of ...

Color images of Pluto released by NASA this year show the dwarf planet has a reddish brown surface. But an even newer photo shows that despite those colors, Pluto's atmosphere has a blue haze. The ...

CAPE CANAVERAL, Fla. — NASA’s New Horizons spacecraft has sent back the last bit of data from its 2015 flyby of Pluto. The picture — one of a sequence of shots of Pluto and its big moon, Charon — ...

CAPE CANAVERAL, Fla. — The sky over Pluto may not be sunny but it’s undoubtedly blue. NASA’s New Horizons spacecraft discovered Pluto’s blue sky during the historic flyby of the icy dwarf planet in ...

When New Horizons flew past Pluto in 2015, NASA expected a cold, cratered fossil at the edge of the solar system. Instead it ...

2015 has been a great year for scientific discovery -- and an especially great year for space exploration. Here are some of the highlights: 1. Pluto In my opinion, Pluto really stole the show this ...

Mountains of water ice tower thousands of meters over fields of frozen nitrogen and methane. Glaciers etched with channels hint at heat bubbling up from below. A patchwork of new and old terrains — ...

After the spacecraft flew by Pluto, it took a look backward. From that vantage point, sunlight illuminated the dwarf planet’s hazy, surprisingly tall atmosphere. “The huge vertical extent of the haze, ...