Astronomers may be closing in on a long-standing cosmic mystery: why some of the universe’s biggest galaxies seem to have far fewer stars than expected. Using NASA- and JAXA-supported XRISM observations of a galaxy called NGC 4151, researchers found strong evidence that supermassive black holes ...
Source: [ScienceDaily](https://www.sciencedaily.com/releases/2026/06/260618041454.htm)