Pluto's heart shines bright in this view from NASA's New Horizons spacecraft.
The haze above Pluto’s surface shows a tenuous atmosphere.
This eerie image shows Pluto’s thin, hazy atmosphere illuminated by the Sun and cut by shadows of mountains and hills.
Pluto has possible ice volcanoes nearly 3 miles high.
Could it be wind or ice sublimating into gas that creates Pluto’s dynamic dunes? Scientists aren’t sure yet.