Two sets of composite images have been released by NASA—each showing a full rotation for Pluto and Charon—the largest of the dwarf planet’s five moons.

Pluto and its largest moon Charon appear in a series of images released by NASA—each performing a full rotation. 
Gathered by the New Horizons explorer, one composite picture shows Pluto making its way through a full Plutonian day—equivalent to 6.4 days on Earth. 
As Pluto spins, we catch sight of the informally named Tombaugh Regio, a heart-shaped expanse of the dwarf planet's geography.
It comes into view and then out again; the so-called "encounter hemisphere" appearing in high detail at the 6 o'clock position.
As we turn to Charon, where the days are just as long, the combined image shows a somewhat less-striking, o