A modified telescope in Arizona has produced an interim map, which is already the largest three-dimensional map of the universe ever — and the instrument is only about a tenth of the way through its five-year mission.

The Dark Energy Spectroscopic Instrument (DESI), a collaboration between Lawrence Berkeley National Laboratory in California and scientists around the world, was installed between 2015 and 2019 on the Mayall telescope at the Kitt Peak National Observatory in the Sonoran Desert, about 50 miles (88 kilometers) west of Tucson, and has been conducting a survey for less than a year.



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