A hypothetical substance to which a galactic radio emission at 1665 megahertz was attributed until it was identified as an exceptionally strong component of a set of four lines emitted by the hydroxyl radical, OH. (From WWFTD)
A hypothetical substance to which a galactic radio emission at 1665 megahertz was attributed until it was identified as an exceptionally strong component of a set of four lines emitted by the hydroxyl radical, OH. (From WWFTD)