DESI's 3D Universe Map Charts 47 Million Galaxies to Probe Dark Energy

The Dark Energy Spectroscopic Instrument (DESI) has produced the largest high‑resolution 3D map of the universe, cataloging about 47 million galaxies (and more than 20 million nearby stars) into a cosmic web of filaments and voids. By mapping galaxy positions over roughly 11 billion years, scientists aim to understand how dark energy shapes cosmic expansion; DESI will continue observations through 2028 to expand the map by ~20%, with first full dataset results expected in 2027.