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English: NGC 21 is a spiral galaxy in the constellation Andromeda. It is located at RA 00h 10m 41.0s, dec +32° 58′ 57″ (J2000), and has an apparent magnitude of 13.9.
spiral galaxy in the constellation Andromeda
|Galaxy morphological type|
|Discoverer or inventor|
|Time of discovery or invention||26 November 1790|