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

For the better part of a century, we believed there were nine planets in our solar system, with Pluto being the farthest from the sun. Since the discovery of more Pluto-sized dwarf planets, that ...

"More Cowbell" will always be one of my favorite sketches on TV's Saturday Night Live. Can't get enough Pluto either! Check out these latest photos.

Pluto is a reminder that there are many worlds out there beyond ... he sent drawings of Jupiter and Mars to Lowell Observatory, a premier observatory in Flagstaff, Arizona, to ask for a job as an ...

Turns out Pluto is covered in ice mountains up to 11,000 feet high. NASA-JHUAPL-SwRI "I had a ... I think it's going to send a lot of geophysicists back to the drawing board." ...

Clyde Tombaugh didn't set out to discover Pluto when he sent his sketches of the night sky to Lowell Observatory in Flagstaff, Arizona in 1929. More than anything, ...