ESA’s Rosetta Spacecraft Makes Unexpected Discovery

Observations of the inner coma of Comet 67P/Churyumov-Gerasimenko with the Alice far-ultraviolet spectrograph onboard ESA’s Rosetta spacecraft reveal that electrons close to the comet’s surface – not solar photons, as had been previously thought – cause the breakup of carbon dioxide and water molecules spewing from the surface of the comet. A team of scientists [...] —> Read More