JWST maps the cosmos with its largest, most detailed 3D survey

Using the COSMOS-Web program, the James Webb Space Telescope has produced the largest-ever 3D map of the universe, charting about 164,000 galaxies over a 255-hour survey to reveal the cosmic web’s skeleton from the present back to when the universe was under 1 billion years old. The map shows dense regions fostering early galaxy growth and, later, environmental quenching in massive galaxies—likely driven by massive dark matter halos and feedback from supermassive black holes—providing new insight into how the large-scale structure of the cosmos evolved. The COSMOS-Web galaxy catalog is publicly available for researchers.