Steady State Universe vs Aristotle's Eternity of the World

[Constantine]

https://m.youtube.com/watch?v=6VYOchKiY0g

What difference is there between this steady state universe and Aristotle's Eternity of the World?

[alan1000]

I'm not familiar with Aristotle's thinking on this particular subject, but I'll bet London to a brick he didn't know any particle physics!

[lauryfriese]

Aristotle's concept of the Eternity of the World, on the other hand, dates back to ancient Greek philosophy. Aristotle believed in the existence of an eternal and unchanging universe. He argued that the universe has no beginning or end and has always existed in its current form. Aristotle's view was influenced by his belief in the immutability of nature and the idea that the cosmos operates based on eternal principles and laws. Candy Crush

[alan1000]

Aristotle's view was also, broadly, the Newtonian view, which prevailed until the end of the 19th C, if I understand correctly. Two significant developments then occurred. The first, I think, was Poincare's thesis of the "Eternal Recurrence", which came in the 1880's; and the paradox he put forward was finally resolved by Relativity Theory at the beginning of the 20th C.

Poincare proved, with irrefutable mathematical arguments, that if the universe were a simple Euclidean infinity in both space and time, as was the contemporary belief (following Aristotle and Newton), then there must exist infinitely many perfect copies of the planet Earth, including perfect copies of you and me. This seemed obviously absurd, but nobody could prove it so. The paradox was only resolved, of course, when Einstein demonstrated that the universe is indeed infinite, but in a rather special way which the classicists would not have understood.

[seeds]

...Poincare proved, with irrefutable mathematical arguments, that if the universe were a simple Euclidean infinity in both space and time, as was the contemporary belief (following Aristotle and Newton), then there must exist infinitely many perfect copies of the planet Earth, including perfect copies of you and me.

Has it also been proven that this hypothesis of there being "perfect copies" of you, and me, and planet Earth, is any less ridiculous than Everett's "Many Worlds Interpretation of Quantum Mechanics"?

This seemed obviously absurd, but nobody could prove it so. The paradox was only resolved, of course, when Einstein demonstrated that the universe is indeed infinite, but in a rather special way which the classicists would not have understood.

In what "special way" did Einstein demonstrate that the universe is infinite?
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