This plot shows the radio emission at numerous frequencies from the molecule ethyl cyanide. Blue is the plot from a terrestrial laboratory measurement; red is the plot from the ALMA observation of a star-forming region in the constellation Orion. The ability to do this type of matching represents a major breakthrough for studying the chemistry of the universe. The graph is superimposed on a Hubble Space Telescope image of the Orion Nebula.
Fortman, et al., NRAO/AUI/NSF, NASA