This roughly true color picture was constructed from a mosaic of six black-and-white images from the Long Range Reconnaissance Imager aboard the New Horizons space craft when it was about 200,000 km beyond Pluto. The color added from a lower resolution Ralph/Multispectral Visible Imaging Camera color image.

The haze is a smog resulting from the action of sunlight on methane and other molecules in Pluto’s atmosphere producing a complex mixture of hydrocarbons that accumulate into small haze particles. As the particles settle down through the atmosphere scattering blue light from the Sun, the smogs forms layers extending to altitudes of over 200 km.

Image Credit: NASA

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