Pluto has long been one of the most debated celestial bodies in our solar system. Once classified as the ninth planet, it was redefined in 2006 as a dwarf planet, a decision that still sparks ...

New Horizons transformed Pluto from a blurry dot into a world of glaciers, mountains, icy plains, and possible hidden oceans.

The erstwhile planet Pluto (now officially an asteroid) was known for decades as a small, dark planet—hidden, difficult to spot, and on a quiet, determined course all its own. And so, when the DHS ...

The New Horizons spacecraft passed Pluto on Tuesday, according to NASA, establishing that mankind — or at least one of its robot probes — has now visited the far reaches of our planetary system. “It’s ...

Your favorite is-it-isn't-it planet, Pluto, finally has its own self-portrait: After almost a decade of wandering through space, NASA's New Horizons spacecraft finally got close enough to Pluto — ...