KnowraPlanck epochLinked fromLinked fromThe 9 pages that link to Planck epoch, each with the reason it gives.All 9Broader topic 3Related 5Narrower topic 1Big BangBroader topic: Known physical theories do not yet provide a tested account of this boundary of Big Bang cosmology.Planck unitsBroader topic: Its defining timescale is expressed directly by the Planck time.Chronology of the universeBroader topic: It marks the limit of current physical theories near the timeline’s beginning.