Mini

DF9: The Third Galaxy Without Dark Matter ⚡ экспресс

Original: "A Third Galaxy Missing Dark Matter along a Trail of Galaxies in the NGC 1052 Field"
arXiv:2603.15860 · 2026-03-16 · CC BY · ⏱ 1 min · Galaxies Cosmology
Galaxy DF9 joins DF2 and DF4 — all lacking dark matter. Their stars move four times slower, confirming a birth in a rare collision that separated gas and invisible mass.
Links in the knowledge graph 1

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.

Scientists
Christian DopplerD. B. McLaughlinDidier QuelozMichel MayorR. A. RossiterAlbert Einstein
Tags
dark matter galaxy spectroscopy
Laws
Doppler effectgravitational lensingMaxwell's equationsPlanck's lawPlanck–Einstein relationWien's displacement law
Original: arXiv:2603.15860 · CC BY · bridge42worlds