'Forbidden' signal predicted 40 yrs ago detected in universe for 1st time

Using the James Webb Space Telescope, Johns Hopkins University researchers have detected a "forbidden" light signal from the trihydrogen cation (H3+) for the first time. The signal was predicted in 1986 but had never been observed, even in laboratory experiments. Often called "the molecule that made the universe", H3+ plays a key role in the formation of complex organic molecules.