A 3D mapping project that will measure the light of millions of galaxies has received the green light from the Department of Energy (DOE). Scheduled to take its first observations in 2019, the Dark Energy Spectroscopic Instrument (DESI) is being designed by the Lawrence Berkeley National Laboratory to provide information about the properties of galaxies, stars, and quasars—especially their relative movement. DESI could provide crucial information about the acceleration of the expanding universe. Link

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