oscillating universe theory

British

noun

the theory that the universe is oscillating between periods of expansion and collapse

"Collins English Dictionary — Complete & Unabridged" 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

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oscillating universe theory

That's the basic premise behind the cyclic or oscillating universe theory, which actually dates back to the 1930s.

From Salon ● Feb. 2, 2023

As the Big Bang became accepted scientific theory, the oscillating universe theory faded away.

From Salon ● Feb. 2, 2023

Definitions and idiom definitions from Dictionary.com Unabridged, based on the Random House Unabridged Dictionary, © Random House, Inc. 2023