HK line comparison table |
Subject | has definition | is a kind of |
---|---|---|
interstellar line | Sharp, distinct absorption lines superposed on stellar spectra, produced by the interstellar gas located between the source and the observer. Strongest are the D lines, followed by the H and K lines, and the K I doublet at 7699 and 7644 Å. | absorption line |
HK line | interstellar line |
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