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

When was Pluto discovered? Pluto was discovered in 1930 by Clyde Tombaugh, an American astronomer at the Lowell Observatory ...

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 ...

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

which he called "Planet X." Years after his death, Tombaugh used a blink comparator to analyze photographic plates of the night sky, eventually spotting Pluto. Today, visitors can explore Lowell ...

Pluto, discovered in 1930 ... which came to be called Planet X. Using a tool called a blink comparator, Tombaugh finally found the mysterious body in 1930. The machine involved taking pairs ...