s blue variableWolf–Rayet starStellar populationSupernovaSupernova impostorHypernovaHertzsprung–Russell diagramColor–color diagramProtostarsMolecular cloudH II regionBok globuleYoung stellar objectHerbig–Haro objectHayashi trackHenyey trackOrionT TauriFU OrionisHerbig Ae/BeLuminosity classSubdwarfDwarfBlueRedWhiteYellowBlackBrownSubgiantGiantBlueRedBright giantSupergiantBlueRedYellowHypergiantYellowBlue stragglerVariable starSpectralclassificationOBAFGKMBeOBSubdwarf OSubdwarf BLate-typeChemically peculiarAmAp/BpOscillatingBariumCarbonCHCNExtreme heliumLambda BoötisLeadMercury-manganeseSShellTechnetiumRemnantsWhite dwarfකලු වාමන තරු (Black dwarf)Helium planetNeutron starPulsarBinaryX-rayX-ray binaryX-ray bursterMagnetarStellar black holeCompact starQuarkStrangePreonPlanckExoticStellar core: EF Eridani BTheoretical starsDark-matter starDark-energy starBlack starGravastarFrozen starQ starQuasi-