This image was taken on July 7th by the New Horizons spacecraft as it approached the dwarf planet Pluto. Now Horizons is set to make a historic flyby of Pluto and its moons on Tuesday. Unusual and complex structures have been can be seen on the dwarf planets terrain and are annotated in the image below.
Pluto downgraded from a planet to dwarf planet status is the 10th largest body known to orbit the sun. It orbits between 4.4 and 7.4 billion kilometers from the sun. It is composed mainly of rock and ice. Light from the sun takes about 5.5 hours to reach it at its average distance from the sun. Pluto has five known moons, Charon, Styx, Nix, Kerberos and Hydra.
Sources: http://apod.nasa.gov/apod/ap150711.html, https://en.wikipedia.org/wiki/Pluto, http://apod.nasa.gov/apod/ap150709.html
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