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

Pluto will mark a birthday of sorts on March 23, 2178. No one is likely to be there to celebrate it, of course. Even if ...

"The data from the termination shock encounter will be a treasure trove for space physicists worldwide who are eager to ...

Clyde Tombaugh didn't set out to discover Pluto when he sent his sketches of the night sky to Lowell Observatory in Flagstaff ...

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 ...

February 18th has been a significant date throughout history, marking a variety of events that have shaped the world. In a ...

Clyde Tombaugh discovered Pluto in 1930 at Lowell Observatory in Flagstaff. Here's how Pluto won - and lost - its planetary status.

How to pack for Pluto? With girded loins, gritted teeth and a brave heart, folks. Pluto’s orbit is arduously long, with the planet changing signs once every twelve to thirty years. Pluto’s ...

Scientists at NASA for the first time have been able to observe the make up of Pluto and other small and icy celestial bodies ...

An amateur astronomer discovered Pluto 95 years ago today. The former planet will complete an orbit in another 153 years.