Andromeda's position in the 88 constellations

Andromeda is one of the 88 constellations in the whole day, located below Ursa Major and near Pegasus. Andromeda is Andromeda in Greek mythology, and the head of the fairy is Sedius, which is a corner of the trapezium of Pegasus. Andromeda has a main galaxy, M3 1 (Andromeda galaxy), which is one of the largest members of the galaxy cluster.

In order to successfully find the Andromeda nebula among many stars, we need to be familiar with the autumn starry sky first. In autumn night, the Milky Way has turned to the northeast, and Cassiopeia can be seen swimming in the Milky Way. It has five quite bright stars, arranged in the shape of the English letter W, which is easy to identify.

To the west of Cassiopeia is Cepheus and to the east is Perseus. Not far from the south of the Milky Way, there are four bright stars arranged in an obvious quadrilateral, which is the famous autumn quadrilateral. All three stars in the quadrilateral belong to Pegasus, and only the star in the northeast corner is Andromeda A star. The visual magnitude of Andromeda A is level 2, white.

From Andromeda to the north of 12, and about 5 to the east, there is a third-class binary star, Andromeda γ-star, whose Chinese name is General Tian. General, we should pay special attention to this day. The Andromeda nebula M3 1 is very close to it, just to the west 1.