DESI Completes Its Epic 3D Map, Hinting that Dark Energy Might Be Changing

A map of the quasars, galaxies, and stars that DESI mapped out over the course of its five year survey. Credit - DESI collaboration and KPNO/NOIRLab/NSF/AURA/R. Proctor

On top of Kitt Peak in the Arizona Desert, a robotic surveyor just completed a five year mission to catalogue the positions of tens of millions of galaxies. The Dark Energy Spectroscopic Instrument (DESI) has now created the largest, most detailed 3D map of our universe ever constructed. And it’s not done yet, its main mission has been extended through 2028.

Universe Today
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