Dark Matter Stabilizes a 60-Star Dwarf Galaxy?

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A tiny collection of a few dozen stars may have been orbiting the Milky Way for billions of years. This would probably only be possible thanks to dark matter.
An international research group has discovered an extremely faint small dwarf galaxy consisting of only around 60 stars orbiting the Milky Way that would probably not exist without a lot of dark matter. The object with the provisional name Ursa Major III/UNIONS 1 – or UMa3/U1 – therefore appears to be more than 10 billion years old. If it were not held together by dark matter, it would have been torn apart by our home galaxy long ago during this period, the research team believes. It is difficult to imagine how the object could be explained in any other way than as the most dark matter-dominated structure we know of. After all, even the smallest known galaxies have thousands or even millions of stars.

Lots of dark matter “very likely”
As the team now explains, the tiny neighboring galaxy was discovered in data from the Canada-Fr…

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