Approximate location of comet 67P/C-G when the Rosetta space probe discovered traces of methyl chloride -- the same molecule detected by ALMA around the IRAS 16293-2422 star-forming region.
Organohalogen methyl chloride discovered by ALMA around the infant stars in IRAS 16293-2422. These same organic compounds were discovered in the thin atmosphere surrounding 67P/C-G by the Rosetta space probe.