Pluto and its five Moons

What New Horizons found exceeded almost everyone's expectations. Pluto was not the geologically dead, featureless ball that many scientists had expected of a small, cold, distant body. It had mountains of water ice rising 3,500 metres above the plains — as tall as the Rocky Mountains. It had a vast, heart-shaped basin of nitrogen ice the size of Texas and Oklahoma combined, called Tombaugh Regio i...