An amateur astronomer discovered Pluto 95 years ago today. The former planet will complete an orbit in another 153 years. On February 18, 1930, just two weeks after his 24th birthday, Clyde Tombaugh ...

The Children's Museum of Indianapolis is set to open its newest exhibit, featuring one of the most popular children's shows of the last 20 years. The first-ever "Mickey Mouse Clubhouse" exhibit at the ...

It's been 18 years since Clyde Tombaugh, Pluto's discoverer, passed away — but on Wednesday the late astronomer got a birthday present that would have made him beam with joy: the closest close-ups ...

Pluto discoverer Clyde Tombaugh could only dream of a spacecraft flying past the small planet he spotted on the edges of the solar system in 1930. Yet the newest views of Pluto from NASA's approaching ...

We’ve launched probes all over the place. We’ve snapped and beamed back pictures of every spot in the solar system. Except Pluto. Call it a planet. Call it a dwarf planet. Either way, it’s the last ...