M31 - The Andromeda Galaxy

M31 is barred spiral galaxy and is the nearest large galaxy to the Milky Way. it was originally thought to be a gaseous nebula. It is visible to the naked eye as a blurry spot and had been observed as far back as 964. In 1925, Edwin Hubble determined based on Cepheid Variable observations that Andromeda was not part of our Milky Way Galaxy, but a seperate Galaxy on it's own. Charles Messier cataloged M31 in 1764 and incorrectly credited German Astronomer Simon Marius for it's discovery. M31 is 152,000 light-years in diameter and contains about 1 trillion stars. It is located in the constellation Andromeda at 00h 42m 44.3s RA, +41^o 16m 09 DEC. It is 2.5 million Light Years from Earth, and has a visual magnitude of 3.4. The best time to observe M31 is in the Winter.

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Freeport, IL USA
23 September 2019
5hrs 52m
Sony A6000
1250
91 Sec
ES80 Triplet
480mm f/6

DeepSkyStacker
Pixinsight
Photoshop

6 Sessions ending on September 23. Used Darks and Flats.