Surprise ‘fossil galaxy’ spotted near mighty Andromeda

An amateur astronomer found a fossilized surprise in the well-studied sky near the bright Andromeda Galaxy.

Skywatcher Giuseppe Donatiello spotted an ultra-faint dwarf galaxy, now dubbed Pegasus V, in archival data from a US Department of Energy camera designed to hunt for dark energy. Intrigued astronomers who heard about his observations then studied the region using a bigger Hawaiian telescope, called Gemini North. Scientists now think that Pegasus V might be a “fossil” of the first galaxies, packed with very old stars.


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