Pluto has been slowly revealing itself to NASA's New Horizons probe, which is speeding towards with the dwarf planet. Here, looks at how this distant world has come into view.
Colour view
Charon, by contrast, may have a chemically simpler surface. “They look as if they are completely different worlds,” says Alan Stern, the mission’s principal investigator and a planetary scientist at the Southwest Research Institute in Boulder, Colorado. “They could as well have been raised billions of miles apart.”
Dark side
The whale and the heart
Charon revealed
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