Have you ever wondered what dog breed Mickey’s pet, Pluto, is? Maybe it is just us, but we’ve always been curious to figure out exactly what Mickey and Minnie’s faithful companion actually is.

“New Horizons shattered a major paradigm of planetary science,” says Alan Stern, the mission’s principal investigator. “Pluto ...

Feb. 18 marks the 95th anniversary of the discovery of our outermost planet-not-planet. Here's what to know about the short ...

Pluto may not be a planet any more, but you still have a chance to see the distant dwarf planet at one of Michigan's ...