The cyclic model proposes that the universe undergoes cycles of expansion and contraction, with each cycle lasting for billions of years. During each cycle, the universe expands and cools, leading to the formation of matter and radiation. As the universe expands, the density of matter and radiation decreases, eventually leading to a contraction phase, where the universe collapses back into a singularity. This cycle repeats indefinitely, with no beginning or end.
The Big Bang theory has been the cornerstone of modern cosmology for decades, suggesting that the universe began as a single point and expanded rapidly around 13.8 billion years ago. However, this theory has several limitations and inconsistencies, particularly when it comes to explaining the universe's very early stages and the observed homogeneity and isotropy of the cosmic microwave background radiation. Steinhardt and Turok propose an alternative theory, known as the "cyclic model," which suggests that the universe undergoes cycles of expansion and contraction, with no beginning or end. endless universe book pdf
Steinhardt, P. J., & Turok, N. (2007). Endless Universe: The Quest for a Theory of Everything. Doubleday. The cyclic model proposes that the universe undergoes
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