Scientists May Have Discovered a Massive Starless Galaxy
- AGC 322753 contains about two billion solar masses of hydrogen.
- It has no stars visible in deep optical images.
- Further observations must confirm whether it is dark or almost dark.
Researchers have identified AGC 322753, a candidate for an unusually massive dark or “almost dark” galaxy: it contains a vast amount of hydrogen but has no visible stars. Confirming its nature could help explain why some dark matter haloes form stars while others do not, and test models…