There are currently 2 astronomical definitions for the tag 'spectrum'.
spectrum
abnormalspectrum, absorptionspectrum, atomicspectrum, brillouinspectrum, continuousspectrum, echellespectrum, emissionspectrum, hydrogenspectrum, microwavespectrum, molecularspectrum, radiospectrum, threedimensionalspectrum, twodimensionalspectrum, vibrationalspectrum, visiblespectrum
hertzsprungrusselldiagram, mkclassification, absorptionline, bremsstrahlung, contiuum, diffractiongrating, emissionline, energylevel, equivalentwidth, fluorescence, forbiddenline, forbiddentransition, freefreeemission, hyperfineline, prism, recombinationline, resonanceline, selfabsorption, spectroscopicanalysis, spectroscopy, stimulatedemission