Pluto, once considered the ninth planet, was reclassified as a dwarf planet in 2006 because it shares its orbital path with ...

For the first time since Pluto was demoted, the idea of a true ninth planet is edging from speculation toward something testable. Instead of restoring Pluto, researchers are closing in on a different, ...

"This mission should be able to image the whole of Pluto. It should be phenomenal." When you purchase through links on our site, we may earn an affiliate commission. Here’s how it works. When NASA's ...