How Cosmic Inflation Flattened the Universe | Space Time | PBS Digital Studios
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Physical universeObservable universeUniverseCosmologyGeneral relativityGeneral relativityCosmological constantAlbert EinsteinPhysical cosmologyDark matterDark energyHubble's lawInflation (cosmology)Flatness problemEternal inflationInflation (cosmology)Horizon problemAstrophysicsPhysical cosmologyEvent horizonCosmic microwave backgroundGalaxiesBlack holeMilky WayGalaxyPhysicsVacuumTimeForceAngular momentum