Filmmaker Adam Nemoy helps celebrate the 90th anniversary of Pluto's discovery this month at the 6th annual 'I Heart Pluto' ...

Late one February afternoon, 24-year-old Clyde Tombaughwas parked in his spot at Lowell Observatory. A transplant from the farm fields of Kansas, Tombaugh had been assigned the task of searching ...

On the surface of the dwarf planet Pluto, there's a 1,600-kilometer-wide area covered by a thick layer of nitrogen ice that ...

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For decades, Pluto was celebrated as the ninth planet of our solar system. However, in 2006, the International Astronomical ...

Pluto was discovered in 1930 by Clyde Tombaugh while he worked at Lowell Observatory in Flagship, Arizona. Sputnik Planitia is a white basin measuring 750 by 1,250 miles near Pluto's equator that ...

It was October 2001, and a leaky Lindley Hall roof and Lawrence light pollution had rendered the 1929 telescope — which had been refurbished by Pluto discoverer Clyde Tombaugh — nearly useless.