Ancient galaxies, so massive that they break modern cosmology, observed with JWST

Unless they’re actually a new type of supermassive black hole.

six different galaxies in pixelated pictures
Images of six candidate massive galaxies, seen 500-800 million years after the Big Bang. One of the sources (bottom left) could contain as many stars as our present-day Milky Way, but is 30 times more compact. Credit: NASA, ESA, CSA, I. Labbe (Swinburne University of Technology). Image processing: G. Brammer (Niels Bohr Institute’s Cosmic Dawn Center at the University of Copenhagen)