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abstraction > mathematical concept > number > quantity > radiation measurement > spectral feature > set of lines > ortho-spectrum |
ortho-spectrum comparison table |
Subject | is a kind of | has definition |
---|---|---|
set of lines | spectral feature | A set of absorption or emission lines in the spectra of a celestial object |
ortho-spectrum | set of lines | Spectrum of triplet (l = 1). |
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