Scientists discover oxygen — on a comet

Comet 67P/Churyumov-Gerasimenko
(Image credit: ESA/Rosetta/NAVCAM/CC BY-SA IGO 3.0)

A new report in Nature reveals that "abundant molecular oxygen" has been found for the very first time on a comet, surprising astronomers and shedding new light on the origins of the solar system.

The observations were taken from comet 67P/Churyumov-Gerasimenko between September 2014 and March 2015 by a European Space Agency spacecraft. As 67P nudged toward the Sun, solar radiation vaporized the ice and gas on comet's surface. Data from this "halo" around the comet were taken by a mass spectrometer.

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