James Webb Reveals Hundreds of Distant Galaxies Through Gravitational Lens of MACS J0454.1-0300

The new James Webb Space Telescope image of the galaxy cluster MACS J0454. 1‑0300 shows a dramatic array of warped and magnified galaxies, a result of gravitational lensing by the cluster’s immense mass. The cluster itself lies so far away that its light has taken about 8 billion years to reach us, allowing us to see it as it existed when the Universe was roughly that age. Behind the cluster, Webb has captured dozens of galaxies that formed only 2 billion years after the Big Bang, and even a single galaxy that existed 800 million years after the Big Bang. One of the cluster’s merging galaxy groups is undergoing a burst of star formation, while individual bright knots—regions as small as 5 light‑years—are magnified by factors exceeding 300. Compared to a 2014 Hubble image, Webb’s greater sensitivity to redder light reveals hundreds of previously unseen galaxies. The data come from ESA/CSA observing programmes #5058 (PI Furtak) and #6882 (PI Fujimoto).