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Astronomers Rule Out One Explanation for the Hubble Tension
Astronomers measure the Universe's expansion rate and have found a discrepancy between the speed nearby versus the speed measured in the Cosmic Microwave Background. This is known as the Hubble Tension, and the search is on for anything that could explain it. One possible explanation is measurement error, which causes the Cepheid variables in galaxies to be too close together, obscuring results. New observations from JWST have removed this as an explanation.
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