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What is Messier 31?

Messier 31 (M31, NGC 224) is the famous Andromeda galaxy, our nearest large neighbor galaxy, forming the Local Group of galaxies together with its companions (including M32 and M110, two bright dwarf elliptical galaxies), our Milky Way and its companions, M33, and others. Visible to the naked eye even under moderate conditions, this object was ...

What is the brightest star in Messier's catalogue?

The only objects listed in Messier’s catalogue that are brighter than M31 are the Pleiades (M45) and the Ptolemy Cluster (M7). The Andromeda Galaxy is one of the most distant deep sky objects visible to the naked eye. The best time of year to observe it is during the months of October, November and December.

What does the M31 star look like?

The blue, ring-like feature that wraps from the upper left to the lower right is a spiral arm with numerous clusters of young, blue stars and star-forming regions. The dark silhouettes trace out complex dust structures. M31 is located in the constellation Andromeda and is best observed in November.

Who added Messier 104 to the Milky Way?

For example, Messier 1 is a supernova remnant, known as the Crab Nebula, and the great spiral Andromeda Galaxy is M 31. Further inclusions followed, the first addition came from Nicolas Camille Flammarion in 1921, who added Messier 104 after finding Messier's side note in his 1781 edition exemplar of the catalogue.

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