Hubble Space Telescope and the ESA Gaia Mission Accurately Weigh the Milky Way
This globular cluster, NGC 4147, seen with the NASA/ESA Hubble Space Telescope and released on March 7, 2019, was one of many which were used by astronomers to measure the total mass of the Milky Way. NGC 4147 is located about 60 000 light-years from Earth in the northern constellation of Coma Berenices (Berenice's hair). Scientists used measurements from the NASA/ESA Hubble Space Telescope and the ESA Gaia mission to improve the estimate of the mass of our home galaxy the Milky Way: 1.5 trillion solar masses. Photo by ESA/Hubble/NASA/UPI
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