Astronomers Find a Third Galaxy Missing Its Dark Matter (universetoday.com)

Astronomers report a third ultra-diffuse galaxy, NGC 1052-DF9, that appears to lack dark matter, continuing a pattern seen in earlier objects such as DF2. The team argues the galaxies were likely produced in a “Bullet Dwarf” style collision, where dark-matter halos pass through while normal matter collides and separates into a trailing structure. Further observations are planned to test additional faint galaxies along the same trail.