Cosmology at at Crossroads: Tension with the Hubble Constant

Abstract

We are at an interesting juncture in cosmology. With new methods and technology, the accuracy in measurement of the Hubble constant has vastly improved, but a recent tension has arisen that is either signaling new physics or as-yet unrecognized uncertainties.

arXiv commentInvited commentary for Nature Astronomy; 10 pages, 2 figures

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