Using data gathered by the Atacama Large Millimeter/submillimeter Array (ALMA) and the Rosetta Orbiter Spectrometer for Ion and Neutral Analysis (ROSINA) instrument on ESA’s Rosetta spacecraft, astronomers have found traces of the organohalogen Freon-40 (CH3Cl), also known as methyl chloride and chloromethane, around the binary protostellar system IRAS 16293-2422 and in the thin atmosphere of the famous comet 67P/Churyumov-Gerasimenko. Freon-40...
