Pluto has been added to the University of Arizona’s scale-model walking tour of the solar system, but will that be enough to mend the dwarf planet’s broken heart? Not likely, according to a recent ...

It has taken nearly a decade and 3 billion miles to get there, but scientists are about to get their first look at Pluto. The New Horizons spacecraft is closing fast on the tiny world once thought to ...

Beneath Pluto’s “heart” lies a cold, slushy ocean of water ice, according to data from NASA’s New Horizons mission. In a paper published today in the journal ...

The first age of solar system exploration is in the books. NASA's New Horizons probe flew by Pluto this morning (July 14), capturing history's first up-close looks at the far-flung world — if all went ...

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 ...