A cyclic universe model proposes that the universe undergoes repeated cycles of big bangs and big crunches, potentially addressing the cosmological constant dilemma. The cosmological constant, linked to the energy of empty space, is crucial for explaining the universe's accelerating expansion, yet its observed value starkly contrasts with predictions from particle physics. Despite Einstein's initial abandonment of the cosmological constant after discovering the universe's expansion, recent interest has resurfaced due to ongoing discrepancies in cosmological measurements. Many argue that scenarios like the Big Freeze and Big Rip are more plausible than the big crunch, given current evidence suggesting infinite expansion. The discussion highlights the ongoing debate about the universe's fate and the implications of a cyclic model.
