ExoMol is a database of molecular line lists that can be used for spectral characterisations and simulation, and as input to atmospheric models of exoplanets, brown dwarfs and cool stars, and other models including those for combustion and sunspots.

The project aims to produce high temperature line lists of spectroscopic transitions for key molecular species likely to be significant in the analysis of the atmospheres of extrasolar planets and cool stars. This molecular data is crucial for accurate astrophysics models of the opacity and spectroscopy of these atmospheres.