There’s been a fierce debate over the past two decades about the status of the distant icy world of Pluto after it was contentiously stripped of its planethood and reclassified as a dwarf planet. Nasa ...

At Voyager 1’s speed, reaching Proxima Centauri would take roughly 76,000 years. That’s longer than recorded human civilization has existed. And unlike a short flyby mission to Pluto, a true ...

Pluto nearly fills the frame in this black and white image from the Long Range Reconnaissance Imager (LORRI) aboard NASAÕs New Horizons spacecraft, taken on July 13, 2015 when the spacecraft was ...