<ul><li>UMa3/U1 is a celestial object that is either the Milky Way's farthest known star cluster or the smallest known galaxy.</li><li>Distinguishing between galaxies and star clusters is not always clear, especially in the case of objects like UMa3/U1, which blurs the line between the two categories.</li><li>UMa3/U1 could be the smallest and most dark matter-dominated galaxy if classified as a galaxy, or the oldest star cluster yet discovered if considered a star cluster.</li><li>Recent studies suggest that UMa3/U1 is more likely a star cluster based on simulations of star motions and mass distribution, but further observations are needed for conclusive evidence.</li></ul>

It’s either the Milky Way’s farthest known star cluster or the smallest known galaxy.

Discover more