The Bohr Atom (51.0K)
At the turn of the century, a far sighted Danish physicist first related the spectral lines seen in the stars for almost a century with the electron levels and chemical properties of the elements, showing that the spectra could be used as a chemical fingerprint for the composition of stars.
Once you become familiar with the pattern of orbitals in the Bohr atom, predictions of spectral features can be made.
Notable as the Balmer lines are visually, many more electrons are involved in the transitions to and from n = 1, the ground state. But these Lyman series changes are too energetic for us to see visually.
The Spitzer Space Telescope is the infrared version of the Hubble, and made to map the warm regions giving off heat less energetic than the visible Balmer lines.
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