Pluto the planet came first. Pluto the pup made is debut in the Disney cartoon "The Chain Gang" in 1930, but was unnamed. Mickey's canine pal woudn't be callled Pluto until the following year.

Pluto was discovered at Lowell Observatory in Flagstaff, Arizona in 1930 and was considered our ninth planet until 2006. The International Astronomical Union reclassified Pluto as a dwarf planet ...

Despite no longer being a planet, Pluto is still loved by millions around the world. And, for a good reason, it is a fascinating object. With a surface covered with mountains, valleys, plains ...

If you answered "Pluto's planethood," your grasp of the astronomical is excellent. Feb. 18 marks the 95th anniversary of the discovery of our outermost planet-not-planet. Here's what to know about ...

He called this hypothetical world "Planet X." "In some ways, Pluto's more of a planet than some of the other established planets, like Mercury." ...

FLAGSTAFF, Az. – Whether Pluto is officially a planet is the least interesting thing about the runt of the solar system, astronomers will tell you 95 years after the discovery of the fascinating and ...

One of the latest mysteries captivating scientists and space enthusiasts alike is the potential discovery of a ninth planet beyond Pluto. Although Pluto was demoted to the status of a dwarf planet ...

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Here's what to know about the short life of what was, for a single human lifetime, the solar system's smallest planet. Pluto was discovered in 1930 by Clyde Tombaugh, an American astronomer at the ...