
The Dark Energy Spectroscopic Instrument (DESI) has completed its five-year mission to build the largest 3D map of the cosmos ever constructed in order to investigate dark energy, the mysterious force driving the accelerating expansion of the universe. The 3D map was completed ahead of schedule on Tuesday night (April 14), but DESI is far from done. With this map in hand, it'll continue to probe some of the greatest mysteries in cosmology.