expanding universe

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

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

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

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.”

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