Pluto's unusual eccentricity and tilt is likely due to its interactions with neighboring Neptune and other giant planets, said Renu Malhotra, a planetary scientist at the University of Arizona who has ...

CAPE CANAVERAL, Fla. (AP) — NASA's New Horizons spacecraft has sent back the last bit of data from its 2015 flyby of Pluto. The picture — one of a sequence of shots of Pluto and its big moon, Charon — ...

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Pluto and its moon Charon imaged by the New Horizons spacecraft in 2015. Image: NASA/JHUAPL/SwRI Start Slideshow It’s been 91 years since amateur astronomer Clyde Tombaugh first spotted Pluto on a set ...

Back in 1930, it was an easy answer: Pluto was a planet because we couldn’t see anything else brighter at a similar distance away from us, says UB cosmologist Dejan Stojkovic. Then, in the 1990s, ...

This artist’s concept shows NASA's New Horizons spacecraft during its 2015 encounter with Pluto and its moon, Charon. The world will get its first good look at Pluto a little more than a year from now ...

During observations of Pluto, an astonishing discovery gradually emerged—there seems to be ice volcanoes on Pluto. This finding instantly ignited the passion of scientists for exploration, as the ...

Pluto, once considered the ninth planet, lies over 6 billion kilometers from Earth, making it one of the most difficult destinations in space exploration. The only spacecraft to reach it, New Horizons ...