EntityQ48997917· pop 6· linked from 7 articlesMissing baryon problemSign in to savediscrepency between observed and predicted amounts of ordinary matterConnectionswarm–hot intergalactic mediumEntityplanetEntityBlack holeConceptBig BangEntityInternational Standard Book NumberEntitycosmologyEntityWayback MachineEntitydigital object identifierEntityInternational Standard Serial NumberEntitydark matterEntityquasarEntitycosmic microwave backgroundEntitybaryonEntityinterstellar mediumEntityQ180686EntityBoltzmann constantEntityHubble–Lemaître lawEntitybibcodeEntityQ118398EntityChandra X-ray ObservatoryEntityCategoriesBaryonsPhysical cosmology