The first pictures sent back by NASA's New Horizons probe after this week's unprecedented Pluto flyby reveal towering mountains made of frozen water — and a giant dark impact basin on top of its ...

For decades, Pluto remained one of the most mysterious objects in our solar system, until July 14, 2015, when NASA's New Horizons spacecraft became the first mission to visit it up close, capturing ...

Giant, ridge-like structures of methane ice, known as "bladed terrain," may be much more abundant along Pluto's equator than previously realized, a new study suggests. When you purchase through links ...

Pluto was dismissed as a frozen has-been at the edge of the solar system. But when NASA finally got a close look, what they saw shattered every assumption. Towering ice mountains. Flowing glaciers.

Pluto sits far out in the Solar System, small and dim, moving at a pace that barely fits human timelines. It was found in 1930, at a time when astronomy still relied on patient observation and ...