Asteria — interactive night sky map
Andromeda Galaxy (Messier 31) is a galaxy in the constellation Andromeda with an apparent magnitude of 3.4, spanning about 178 arcminutes. Under dark skies it can be spotted with the naked eye.
It is best placed in the evening sky around September. It is visible from the whole northern hemisphere and from southern latitudes down to about 49°S. It is circumpolar (never sets) north of latitude 49°N.