<ul><li>UMa3/U1, a recently discovered astronomical object, poses a challenge in defining whether it is a small galaxy or a star cluster.</li><li>The distinction between Ultra-Faint Dwarfs (UFDs) and star clusters is blurred due to the significant presence of dark matter in UFDs.</li><li>UMa3/U1 is exceptionally small, measuring only 20 light-years across with around 60 stars and a visible mass equivalent to 16 Suns.</li><li>Based on current evidence, UMa3/U1 is likely a stable star cluster, although more observations are needed to confirm its classification.</li></ul>

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