3 sky surveys completed in preparation for Dark Energy Spectroscopic Instrument
It took three sky surveys—conducted at telescopes in two continents, covering one-third of the visible sky, and requiring almost 1,000 observing nights—to prepare for a new project that will create the largest 3-D map of the universe’s galaxies and glean new insights about the universe’s accelerating expansion.
phys.org
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2019-07-09
