EXPANDING UNIVERSE Definition & Meaning

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expanding universe

noun

Astronomy.

a concept or representation of the universe, based on the observed redshifts of distant galaxies, in which the galaxies are assumed to be receding from each other at a speed proportional to their separation as a result of the expansion of the universe.

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�y��vlog History and Origins

Origin of expanding universe¹

First recorded in 1930–35

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Example Sentences

Examples have not been reviewed.

Belgian cosmologist and Catholic priest Georges Lemaitre made that connection by realizing that the theory of general relativity described an expanding universe.

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In other words, we're trying to find out the speed limit of the expanding universe, but some measurements have given us different answers.

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As a crosscheck, an initial Webb observation in 2023 confirmed that Hubble measurements of the expanding universe were accurate.

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And here they imagined a cosmology that encompassed “an expanding universe, all bound together by the elastic string of time,” best understood — as Steinbeck wrote — by looking “from the tide pool to the stars and then back to the tide pool again.”

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Could pairs of black holes exist in harmony in an ever expanding Universe, perhaps masquerading as one?

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