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 ...

What was discovered in Flagstaff, Arizona, and killed off in Prague? If you answered "Pluto's planethood," your grasp of the ...

From farm boy to cosmic pioneer: The life and legacy of Clyde Tombaugh. When you purchase through links on our site, we may earn an affiliate commission. Here’s how it works. When Clyde Tombaugh ...

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

Pluto, with its heart-shaped glacier, as captured by the New Horizons spacecraftJPL/NASA Pluto will mark a birthday of sorts on March 23, 2178. No one is likely to be there to celebrate it, of course.