![]() The result is a new solution to Einstein's equations, which Penrose takes to represent the entire universe, and which is composed of a sequence of sectors that Penrose calls "aeons". ![]() In particular, each individual FLRW metric g a b g_ is multiplied by the square of a conformal factor Ω \Omega that approaches zero at timelike infinity, effectively "squashing down" the future conformal boundary to a conformally regular hypersurface (which is spacelike if there is a positive cosmological constant, as is currently believed). Penrose noticed that the past conformal boundary of one copy of FLRW spacetime can be "attached" to the future conformal boundary of another, after an appropriate conformal rescaling. Penrose's basic construction is to connect a countable sequence of open Friedmann–Lemaître–Robertson–Walker metric (FLRW) spacetimes, each representing a Big Bang followed by an infinite future expansion. Penrose popularized this theory in his 2010 book Cycles of Time: An Extraordinary New View of the Universe. ![]() the latest end of any possible timescale evaluated for any point in space) of each previous iteration being identified with the Big Bang singularity of the next. In CCC, the universe iterates through infinite cycles, with the future timelike infinity (i.e. Conformal cyclic cosmology ( CCC) is a cosmological model in the framework of general relativity and proposed by theoretical physicist Roger Penrose.
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