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

2 junio 2015

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.