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NASA announced Thursday that its Hubble Space Telescope (HST) has calibrated more than 40 “mile markers” for space and time.
Runtime markers help scientists measure the expansion rate of the universe, and using data from the HST and other telescopes, astronomers have found a discrepancy between the expansion rate measured in the local universe and independent observations since the Big Bang.
Data issue with NASA VOYAGER 1 spacecraft.
The reason for the discrepancy is not yet known, but NASA says HST data supports new physics.
The expansion rate of the universe called the “Hubble constant” After Edwin Hubble.
He was the first to calculate a constant from his measurements of stars in 1929, and it can be used to predict how fast astronomical body At a known distance from the earth.
However, the true value of the Hubble constant is still a matter of debate, according to the University of Chicago, Hubble University.
Cepheids, or stars that periodically brighten and dim, have long been the gold standard for cosmic mile markers. For long distances, astronomers use explosive stars called Type Ia supernovae.
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In the new study, a national scientific collaboration called SH0ES (a supernova, H0, for the dark energy equation of state) measured 42 supernova signals using Hubble.
“Project SH0ES was designed to create the structure of the universe by matching it to the precision of the Hubble constant derived from studying the residual cosmic microwave background radiation since the beginning of the universe,” NASA said in a statement.
The results of the project more than doubled the previous sample of cosmic distance markers.
The agency also clarified that the expansion rate of the universe is expected to be slower than what Hubble actually sees, with a smaller value for the Hubble constant calculated using the Standard Cosmological Model of the Universe and measurements made by the European Space Agency’s Planck mission. than the SH0ES team intended.
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Nobel laureate Adam Rees of the Space Telescope Science Institute (STScI) and Johns Hopkins University, who leads SH0ES, said that given Hubble’s large sample size for tilt markers, astronomers stand a one in a million chance. . wrong.
New NASA Webb Space Telescope This will extend the HST operation by showing milestones at a greater distance.
