Updated March 2026 In The End of the Universe I remarked on the surprising similarity between conditions in the very early Universe, just after the Big Bang, and the far future of the Universe. In this post I’ll give an overview of Roger Penrose’s model of the Universe in which it passes endlessly through a… Continue reading A Cyclical Universe
Revised March 2026 Conformal cyclical cosmology (CCC) is Roger Penrose's model of the Universe where it passes endlessly through a possibly infinite number of cycles (or aeons) each of which starts with a big bang and ends with a rapidly expanding empty universe. This fascinating idea was proposed in a rather technical book titled Cycles… Continue reading Roger Penrose – Cycles of Time
Discusses the nuances of distance measurement in cosmology., focusing on the cosmic microwave background (CMB) and its proper distance of 46 billion light years from Earth. It clarifies concepts such as light travel distance, proper distance, comoving distance, and various astronomical distance metrics, emphasizing the expansion of the Universe
I was interested to hear that Jim Peebles, at the age of 84, has won a half share of the 2019 Noble Prize for physics for theoretical discoveries in physical cosmology. Jim Peebles (1935-) Image from Wikimedia commons In the early 1960s Peebles and his colleague Robert Dicke had predicted the existence of the microwave… Continue reading Jim Peebles winner of the Noble Prize 2019
The post discusses the anthropic principle, which suggests that the laws of physics and the universe are finely tuned for life. Introduced by Brandon Carter in 1973, it highlights how slight changes in fundamental forces would prevent life. The article contrasts strong and weak anthropic principles and touches upon concepts like the Omega Point and multiverse theory.
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