Hello! Another deep-sky object that is worth seeing is M31, a large galaxy in Andromeda, this is the brightest galaxy seen from the northern hemisphere. Under the good, dark sky is visible to the naked eye. Let's watch this galaxy closely! I invite you to read.
M31 photography with a long exposure time
By Kees Scherer link [Public domain]
If the night is dark and the weather is good, it can be seen with the naked eye about 3 degrees north of the middle star in Andromeda (mi [μ] andromedae), towards the constellation Cassiopeia. It looks like a gray, longitudinal spot. The 10 X 50 binoculars show an elongated white disk that stretches in the sky to almost 2 degrees. This is a large object, the galaxy in the sky is four times the size of the moon! Unfortunately, its brightness of +3.5 mag makes it an object with low surface brightness. In the middle of the disk is the perfectly visible core of the galaxy. The brightness of the disk gradually decreases towards its edges.
Location of the M31 galaxy in the sky
By User: Keilana, derived from User: Roberto Mura link [CC BY-SA 3.0 license]
Dark, rural skies and 15 X 70 or 20 X 80 binoculars will allow you to find out the true size of M31. When we want to see it through a telescope, we must use the smallest magnification we have (30 to 40X) to capture the largest part of the galaxy in the field of view. Under the rural, dark sky with large binoculars you will see the view as in the picture below.
M31 in binoculars 15 X 70 under a good dark sky
By Lukáš Kalista(reworked by me) link [CC BY-SA 3.0 license]
A telescope with a diameter of 8 "(200 mm) will allow you to see more closely the dark bands around the nucleus. Under the rural sky you will see such a telescope as below. In better conditions, a much larger part of the disk of this huge galaxy will be visible.
M31 in an 8-inch telescope, average conditions
By Brucewaters(reworked by me) link [CC BY-SA 4.0 license]
To the south of M31 lies the M32 galaxy with magnitude +9 mag visible in the telescope as a weak oval (object at left of the top of the photo above). On the other side of the M31 disc, a little further away from it is the galaxy M110 with a magnitude of +8 mag (bottom right part of the photo above). To sum up, M31 is a must-have and I encourage you to see this brightest galaxy of northern sky. I hope these tips will help you.
Greetings to lovers of Astronomy!
Sources:
Andromeda Galaxy
Messier 32
Messier 110
Andromeda (constellation)
and my knowledge...
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