Concepedia
The Astrophysical Journal · 1966 · 78 citations · 0 references
Natural SciencesAstronomyInterstellar MediumSpectroscopyAtomic SpectraEmission SpectroscopyHydrogen AtomHyperfine StructureInterstellar Absorption LinesStark EffectH I Fine-structure EmissionH I Power SpectraLine Emission Spectra