
Cosmic atlas reveals 47 million galaxies to probe dark energy
Astronomers using the Dark Energy Spectroscopic Instrument (DESI) have completed the largest high‑resolution 3D map of the universe, mapping more than 47 million galaxies. The dataset could sharpen our understanding of dark energy and the cosmic expansion, potentially testing whether dark energy is the cosmological constant, with about 20% more sky to be added by 2028 and definitive dark‑energy results expected in 2027.
