Pluto’s blue atmospheric ring in the infrared

2 February 2016 Astronomy Now

A new image from NASA’s New Horizons spacecraft is the first look at Pluto’s atmosphere in infrared wavelengths, and the first image of the atmosphere made with data from the probe’s LEISA instrument. The blue ring around Pluto is caused by sunlight scattered from a haze of hydrocarbon particles in the form of a photochemical smog.

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Extended haze in Pluto’s atmosphere

25 July 2015 Astronomy Now

Backlit by the Sun, Pluto’s atmosphere rings its silhouette like a luminous halo in this image taken by NASA’s New Horizons spacecraft on July 15. This global portrait of the atmosphere was captured when the spacecraft was about 1.25 million miles (2 million kilometres) from the dwarf planet.