The Andromeda constellation was known already to ancient Greeks.
The Andromeda constellation consists of 16 stars visible in the northern sky. Named by ancient Greeks after the mythological Andromeda princess, the constellation contains the Andromeda Galaxy, the nearest full-fledged galaxy to our own Milky Way.in 150 AD in his famous work"The Almagest."
Ptolemy's list was the first official description of constellations, although these stellar groupings had been known to ancient Greeks, Babylonians, Egyptians and other cultures, who frequently saw them as embodiments of their mythical figures. Another 40 constellations were added to Ptolemy's tally over the centuries. Many of these additions reside in the southern sky, which was not visible to Ptolemy, who spent most of his life in Egypt.
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