Pluto is hiding a very big secret some 3 billion miles away from Earth: a vast ocean of liquid water. If you could suck all of the liquid from below the dwarf planet's icy shell, it might amount to a ...

So goes the outdated perception of Pluto, the dwarf planet on the periphery of the solar system. NASA’s New Horizons spacecraft proved otherwise; the probe's 2015 flyby revealed “a scientific ...

With discoveries about Pluto from NASA’s New Horizons mission rolling in, here are nine of the most interesting facts about the former planet. 1. Pluto was first discovered by a young research ...

Pluto was once considered the ninth planet in the solar system. It was demoted in 2006. When you purchase through links on our site, we may earn an affiliate commission. Here’s how it works. Pluto is ...

The exploration of Pluto wasn’t easy, but it sure was worth it. As David Grinspoon and I recount in our book, Chasing New Horizons, it took 14 years (1989 to 2003), about a dozen different mission ...