A new recipe created in a NASA laboratory has re-created the composition of the atmosphere on Titan — the largest moon orbiting the planet Saturn — and in the process managed to classify a previously unidentified material in the moon’s atmosphere spotted by Cassini‘s Composite Infrared Spectrometer. To re-create the atmosphere, NASA scientists combined a number of different gases in a chamber and let them react with each other. With the correct gases and the correct conditions, the idea is that those reactions should produce the same materials found in the moon’s atmosphere. Although the scientists knew something about Titan’s atmosphere — for example, that the two most plentiful gases are nitrogen and methane — the exact proportions and other materials are unknown. Previous experiments yielded nothing that matched the spectral signature seen by Cassini.