When astronomers first spotted Ursa Major III/UNIONS 1, it caused a little excitement. The group of stars at the edge of the Milky Way, not adding up to much more than 16 solar masses, appeared to be ...

Astronomers have discovered a collection of tiny galaxies located roughly 3 million light-years away that includes the ...

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How do you distinguish a galaxy from a mere cluster of stars? That's easy, right? A galaxy is a large collection of millions or billions of stars, while a star cluster only has a thousand or so. Well, ...