WStellar evolution
WAsymptotic giant branch
WBlack dwarf
WBlue loop
WBoomerang Nebula
WFU Orionis star
WGalactic superwind
WGalaxy formation and evolution
WHelium flash
WHenyey track
WHertzsprung gap
WHertzsprung–Russell diagram
WHess diagram
WHypernova
WInstability strip
WKelvin–Helmholtz mechanism
WMain sequence
WPlanetary nebula
WProtoplanetary nebula
WRed clump
WSakurai's Object
WStellar isochrone
WSuper-AGB star
WSuperluminous supernova
WSupernova
WTurnoff point
WWhite dwarf