11/13/2023 0 Comments Jwst images vs hubble![]() Some of these explanations “look semi-successful, some of them look like failures, some of them would cause other problems,” he says. “Papers in the literature over the last 10 years have invoked anything from weird dark matter to weird dark energy, to another particle, to a magnetic field in the early universe to a new field, all kinds of things” to explain the Hubble tension, says cosmologist Adam Riess of Johns Hopkins University. Unless an error turns up in one of the measurements, it will take strange new physics to explain the tension. Although the Planck number disagrees from the Hubble telescope and JWST number by less than 10 percent, the discrepancy in the measurements implies that there’s something terribly wrong with our understanding of the universe. The telescope took images of the same stars as the Hubble telescope and calculated a very similar Hubble constant. The discrepancy is known as the Hubble tension, and new JWST data hasn’t done anything to ease it ( SN: 7/30/19). Hubble Space Telescope images of stars at various distances from us provide a fundamentally incompatible value - 73 kilometers per second per megaparsec. One calculation, based on Planck satellite observations of the oldest light in the universe in conjunction with the standard model of cosmology, suggests the Hubble constant is 67.4 kilometers per second per megaparsec (a megaparsec is about 3 million light-years). The conflict comes down to calculations of the Hubble constant, a number that describes how fast everything in the universe is flying apart. The observation is in conflict with an esteemed theory, the standard model of cosmology, that describes how the universe has evolved since the first moments after the Big Bang. Images from the James Webb Space Telescope have confirmed that the universe appears to be expanding significantly faster than it should be, researchers report in a study accepted in the Astrophysical Journal. The greatest puzzle in cosmology just got even more puzzling.
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