NASA’s James Webb Space Telescope has revealed an ancient galaxy cluster with an unexpectedly dense concentration of dark matter, challenging theories about how the universe developed. The discovery also uncovered a surprising connection between scattered starlight and invisible dark matter that could transform how astronomers study the early cosmos.
NASA's James Webb Space Telescope (JWST) has imaged a massive galaxy cluster coded XLSSC 122 that formed shortly after the Big Bang, overturning standard cosmology models.