Wolfram|Alpha

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Input interpretation:

M31  (Andromeda galaxy)


Properties:

distance from Earth | 788.3 kpc\n2.571 million ly\naverage radius | 70780 ly\nredshift | -9.907×10^-4\nradial velocity | -184.5 mi\/s\nHubble type | Sb  (spiral)\napparent magnitude | +3.5  (visible to the naked eye in dark skies)\nalternate names | NGC 224  |  Andromeda Galaxy  |  Andromeda Nebula  |  MCG 7-2-16  |  PGC 2557  |  UGC 454


Equatorial location:

right ascension | 42^m 44.3^s\ndeclination | 41° 16\' 8"

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