KnowraEjnar HertzsprungLinked fromLinked fromThe 4 pages that link to Ejnar Hertzsprung, each with the reason it gives.All 4Related 4Hertzsprung–Russell diagramRelated: His early plots revealed distinct groups of stars with different luminosities.Red dwarfRelated: His work made “dwarf” a stellar classification tied to luminosity and size.Henry Norris RussellRelated: His parallel work gave the diagram its other name and helped establish its significance.SubdwarfRelated: His work helped distinguish stars of similar spectral type by luminosity.