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Loading contentA spectroscopic survey measuring the redshifts of tens of millions of galaxies to map cosmic expansion and dark energy.
Mounted on the Mayall Telescope at Kitt Peak, DESI is building the largest 3-D map of the Universe, using baryon acoustic oscillations to trace expansion history. Its early results hint that dark energy may not be perfectly constant.
Facts on this topic will be cited from these primary and reference sources.
Spectroscopic redshift survey measuring baryon acoustic oscillations and dark energy.
Ground-based optical/infrared observatory data and imagery.