KnowraHydrogen-alphaLinked fromLinked fromThe 17 pages that link to Hydrogen-alpha, each with the reason it gives.All 17Broader topic 6Related 10Compared with 1Spectral lineBroader topic: This prominent line traces ionized hydrogen in stars, nebulae, and the Sun.Fine structureBroader topic: Its spectral components reflect fine-structure differences among the participating levels.Emission nebulaBroader topic: H-alpha gives many hydrogen-rich emission nebulae their distinctive red appearance.Balmer seriesBroader topic: It is the longest-wavelength and usually most familiar Balmer line.Hydrogen spectral seriesBroader topic: This bright red line is widely used to map ionized hydrogen in space.Hydrogen spectrumBroader topic: This conspicuous line is widely used to map solar and nebular hydrogen.