New images of Pluto snapped by the New Horizons probe as it flew past the dwarf planet Tuesday show that a vast heart-shaped region now known as Tombaugh Regio is actually a crater-less plain made up ...

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 ...

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

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 ...