The universe loves a joke: a third galaxy has been found that does without dark matter. Its stars move four times slower than they should. Scientists suspect it’s the aftermath of an ancient “galactic crash” that separated the invisible stuff from ordinary gas. The discovery changes our understanding of how galaxies are born.
🎯 If you imagine galaxy DF9 as a city street, its stars are pedestrians strolling at 6.5 km/s. Meanwhile, the Milky Way is a racetrack, where stars zoom like Formula 1 cars under the guidance of an invisible dispatcher.