To study dark energy’s effects over the past 11 billion years, the Dark Energy Spectroscopic Instrument (DESI) has created the largest 3D map of our cosmos ever constructed, with the most precise measurements to date. This is the first time astronomers have measured the expansion history of the young Universe with a precision better than 1%, giving us our best view yet of how the Universe evolved. A slice of the 3D map of galaxies collected in the...
