The growling list of mysteries surrounding Pluto just got longer. On Oct. 8, NASA released the first color photo of Pluto's atmosphere, and the shade they saw was anything but expected: "Who would ...

WASHINGTONWASHINGTON — Spurned Pluto is changing its looks, donning more rouge in its complexion and altering its iceball surface here and there. Color astronomers surprised. Newly released Hubble ...

Pluto and its largest moon Charon orbit their mutual center of gravity (marked with 'x') in this still from the first color animation of Pluto from NASA's New Horizons spacecraft captured between May ...

New Horizons scientists combined the latest black and white map of Pluto’s surface features (left) with a map of the planet’s colors (right) to produce a detailed color portrait of the planet’s ...

Your support goes further this holiday season. When you buy an annual membership or give a one-time contribution, we’ll give a membership to someone who can’t afford access. It’s a simple way for you ...

The first color "movies" of Pluto as seen by NASA's New Horizons spacecraft reveal the sheer strangeness of the orbital dance between the dwarf planet and its largest moon Charon. In a new animation ...

WASHINGTON—Spurned Pluto is changing its looks, donning more rouge in its complexion and altering its iceball surface here and there. Color astronomers surprised. Newly released Hubble Space Telescope ...