Alice instrument's ultraviolet close-up provides a surprising discovery about comet's atmosphere

Tuesday, June 2, 2015 - 15:00 in Astronomy & Space

A close-up of Comet 67P/Churyumov-Gerasimenko by NASA's ultraviolet instrument surprised scientists by revealing that electrons close to the comet's surface -- not photons from the sun as had been believed -- cause the rapid breakup of water and carbon dioxide molecules spewing from the surface.

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