The Dark Energy Spectroscopic Instrument spent five years observing the sky from Arizona. Now, researchers have a trove of data to study how the universe has evolved over billions of years The largest 3D map of the universe. Earth is at the center, and each point marks a galaxy. DESI Collaboration and DESI Member Institutions / DOE/KPNO / NOIRLab / NSF / AURA / R. Proctor, Image Processing: M. Zamani (NSF NOIRLab) An astronomical effort—both in the literal and metaphorical sense—to map the night sky in three dimensions has just concluded. The undertaking not only finished a bit ahead of schedule, but also gathered significantly more data than the huge team of collaborators had originally aimed for. The effort has produced the largest-ever high-resolution 3D map of the universe, which spans 11 billion years of cosmic history.…