Linked from
The 27 pages that link to Molecular spectroscopy, each with the reason it gives.
Physical chemistryBroader topic: Spectra reveal molecular energy levels, structure, and motion.
AstrochemistryRelated: Spectral lines reveal molecular identities and physical conditions in space.
Robert S. MullikenRelated: Mulliken used molecular spectra to test and refine orbital explanations.
VY Canis MajorisRelated: Molecular lines reveal the composition and motion of gas around the star.
Sagittarius B2Related: Spectral lines reveal the many molecules present in Sagittarius B2.
CW LeonisRelated: Spectral lines in the envelope identify its molecules and physical conditions.