We keep learning more about Pluto's rocky heart. NASA's New Horizons mission discovered a second mountain range situated on the lower-left edge of Pluto's best-known feature, the bright, heart-shaped ...

Astronomers have just found the best evidence yet of an entire ocean in an exceedingly unlikely place—the dwarf planet Pluto, in the dark hinterlands of the solar system. There, nitrogen and other ...

A huge heart-shaped feature on the surface of Pluto has intrigued astronomers since NASA’s New Horizons spacecraft captured it in a 2015 image. Now, researchers think they have solved the mystery of ...

Pluto’s first official surface-feature names are marked on this map, compiled from images and data gathered by NASA’s New Horizons spacecraft during its flight through the Pluto system in 2015. (IAU ...

A newly discovered mountain range lies near the southwestern margin of Pluto’s Tombaugh Regio (Tombaugh Region), situated between bright icy plains and dark heavily cratered terrain. This image was ...

It’s been a busy week for NASA. On Monday, the Deep Space Climate Observatory unveiled a new “Blue Marble” snapshot of Earth, taken from 1 million miles away. Then two days later, the Kepler mission ...

We knew that there were dark regions and bright regions, and yet when you see them and you see that this Tombaugh Regio is this very concentrated smooth pile of these very volatile ices that should be ...

No more pussyfooting around. It's official: Pluto has 14 new place names. Most we suspected would be there, but a few are new. Pluto's "heart" now bears the name of American astronomer Clyde Tombaugh, ...

This image captured by NASA' s New Horizons spacecraft on July 15 shows Pluto backlit by the sun. This image, released by NASA on July 24, shows a combination of images captured by the New Horizons ...

You did get to honor Pluto’s discovery in Flagstaff by naming regions for Percival Lowell, who established the observatory there, and Clyde Tombaugh, who discovered Pluto. I’m glad we could do that. I ...