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# Dark Energy and Dark Matter

These Hubble Space Telescope images showcase two of the 19 galaxies analyzed in a project to improve the precision of the universe's expansion rate, a value known as the Hubble constant. The color-composite images show NGC 3972 (left) and NGC 1015 (right), located 65 million light-years and 118 million light-years, respectively, from Earth. The yellow circles in each galaxy represent the locations of pulsating stars called Cepheid variables

Fresh evidence for new Physics in the universe

By using NASA's Hubble Space Telescope, astronomers have precisely measured the expansion rate of the universe since it was first calculated nearly a century ago....