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Using two of the most powerful space telescopes in the world, researchers made the most accurate measurements of the rate of expansion of the Universe. The results are significant and support the idea that the rate of expansion of the near universe is different from that of the distant and primordial universe. The imbalance of measurements could also allude to the presence of new physics in the universe.
The expansion of the universe was introduced by Edwin Hubble nearly a century ago and contradicts the idea that the universe is static and remains the [19659003ResearchersareusingtheHubbletelescopetorefinemeasurementsofdistancestogalaxiesandtocalculatehowquicklytheuniverseexpandsovertimeThespeedatwhichtheuniverseisdevelopingiscalledHubble'sconstantButasthemeasuresbecamemorepreciseovertheyearstheyshowedapersistentdivergencebetweenpreviousmeasuresofthecurrentrateofexpansionAstronomershavenowrefinedthevalueoftheHubbleconstantbycombiningobservationsfromNASA'sHubbleSpaceTelescopeandtheGaiaSpaceObservatoryoftheEuropeanSpaceAgency(ESA)
"With the Adding new data, says George Efstathiou of the Kavli Institute of Cosmology in Cambridge, who was not involved in the study, says:
The measures of the Expansion of the primitive universe (13.8 billion years after the Big Bang).) are performed by the Planck satellite of the European Space Agency, which maps the cosmic microwave background, which is a relic of the big bang, although these measures do not seem to correspond to recent measurements of our contemporary neighbors.With the help of Hubble and Gaia measurements, the researchers have considerably reduced this uncertainty.
"Hubble is really amazing as a generalist.permits an observatory but Gaia is the new benchmark in distance calibration, "said Stefano Casertano of the Institute of Space Telescope Science. "Gaia brings a new ability to recalibrate all past distance measurements, and this seems to confirm our previous work: it's a cross between two very powerful and accurate observatories."
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