Dark matter may not be a cosmic loner. New theoretical models suggest a hidden dark force could slow the growth of galaxies and clusters, challenging standard cosmology and the S8 tension.
Astronomers have observed one of the rarest supernovae ever: a giant star destroying itself in a pair-instability explosion, challenging stellar evolution models and seeding the cosmos with heavy elements.
The James Webb Space Telescope has weighed a dormant supermassive black hole from 10 billion light-years away, revealing it to be 6 billion times the mass of our Sun.
Could white holes—objects that only spit out matter—explain the Big Bang? Theoretical physicists explore a cosmic bounce from a previous universe’s black hole.