An Arizona observatory where Pluto was discovered turns a summer night into a dreamy mix of stargazing and history.

The instrument at Lowell Observatory used by Clyde Tombaugh to discover Pluto will soon undergo renovation. The year-long project, set to begin on January 12, will include restoration of both the ...

Researchers are constantly sifting through new spectral data gathered by powerful telescopes, like the James Webb Space ...

Add Yahoo as a preferred source to see more of our stories on Google. Pluto’s thin, blue haze glows in this image from NASA’s New Horizons spacecraft. Though the dwarf planet is just a faint speck ...

NEW YORK (AP) - NASA's Webb Space Telescope has identified new clues about the surface of Pluto's largest moon. It detected for the first time traces of carbon dioxide and hydrogen peroxide on the ...

When the International Astronomical Union announced in 2006 that Pluto was being demoted from its status as the sun's ninth planet, many astronomers and non-experts alike were shocked. That's why my ...

Add Yahoo as a preferred source to see more of our stories on Google. Pluto was discovered 95 years ago on Feb. 18, and even though it was demoted nearly two decades ago, it remains a fascinating part ...

Titan and Pluto sit at opposite ends of the solar system, one a giant moon wrapped in thick orange haze. The other is a ...

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Some of us remember August 24, 2006, like it was yesterday. It was the day Pluto got booted from the exclusive “planets club.” I (Sara) was 11 years old, and my entire class began lunch break by ...

Pluto, with its heart-shaped glacier, as captured by the New Horizons spacecraft Credit - JPL/NASA Members of the media garbed in protective uniforms view NASA's New Horizons spacecraft on Nov. 4 2005 ...

Pluto, discovered in 1930, was once considered the ninth planet in our solar system. In 2006, the International Astronomical Union reclassified Pluto as a dwarf planet because it doesn't meet all the ...