The Dark Energy Spectroscopic Instrument (DESI), which involves UCL researchers, has completed its originally planned mission, observing the light from more than 47 million galaxies and quasars, and creating the largest high-resolution 3D map of our universe to date. Scientists are using DESI’s map to study dark energy, one of the biggest mysteries in physics. Because of the instrument’s excellent performance and hints that dark energy might evolve, DESI will continue observations into 2028 and