The Impossible Size of the Smallest Galaxy We_ve Ever Found
Close your eyes and let the impossible size of the smallest galaxy ever found settle into your mind. A story of a tiny system that should not exist. Andromeda XXXV is the smallest and faintest galaxy ever observed, a millionth the size of the Milky Way, yet it survived the boiling oil of the early universe when larger galaxies were destroyed. Another candidate, Ursa Major III/UNIONS 1, contains only 57 stars held together by an invisible mass of dark matter, and if confirmed as a galaxy, it would be the richest in dark matter ever discovered. These tiny systems are a cosmic riddle…
The skinny
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