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Another great shot of the Sputnik Planum (a huge plain smoothly expanding on the right side of the image) and icy mountains on planet Pluto. The Norgay Montes - named after Tenzing Norgay - in the foreground, reach 3.4 km (or 11 000 feet) above Pluto's surface; the Hillary Montes in the background - named in honour of Sir Edmund Hillary - mount up to a height of 1.6 km or 5200 feet. Both mountain ranges most probably consist of water ice that is rock solid at temperatures of 38 K (or -235 °C). The driving forces behind the formation of these high mountains are still not understood.
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