KnowraGiant starLinked fromLinked fromThe 3 pages that link to Giant star, each with the reason it gives.All 3Broader topic 2Compared with 1Henry Norris RussellBroader topic: The diagram’s separated giant region revealed that stars of similar color can have very different luminosities.Ejnar HertzsprungBroader topic: Hertzsprung identified giant stars as a distinct luminosity class among stars of similar spectral type.