Constellation knowledge _ What galaxy does Andromeda have?

Andromeda, one of the 88 constellations, is Andromeda in Greek mythology. As for galaxies, most people have a shallow understanding of them. So what galaxy does Andromeda have? Let's take a look at the constellation knowledge together.

Andromeda has a main galaxy, Andromeda Galaxy, which is one of the largest members of this galaxy group. Located below Ursa Major, near Pegasus. The fairy's head is Cedius, a corner of the Pegasus quadrangle. Andromeda extragalactic galaxy, like the Milky Way, is a celestial system. Satellite galaxies of Andromeda galaxy was discovered 1900 years ago, such as elliptical galaxy M32, elliptical galaxy M 1 10, dwarf ellipsoid galaxy NGC 185 and NGC 147.

The Andromeda Nebula has a total magnitude of 4 and an average brightness of 6 per unit area. On a clear moonless night, it is faintly visible to the naked eye, like a small white cloud. Its soft silvery white oval shape can be seen through a small astronomical telescope. Andromeda nebula is a typical spiral galaxy, but because it faces us sideways, it is not easy to see its spiral arms. Through a larger telescope, we can see some of its structures, for example, its core is particularly bright, and the brighter it gets toward the center, we can also see some spiral arms, black dust lines, globular clusters and star clouds.

In addition, we can also see its two dwarf companion stars, one is a small, round and dense elliptical galaxy M32 in the south of M3 1, and the other is an elliptical galaxy M 1 10, which is slightly darker but larger and longer than M32 and located in the northwest of M3 1. There are also many dim stars in the Milky Way that fill this sky area, adding fascinating colors to the Andromeda Nebula.

Andromeda galaxy is the largest galaxy nearest to our galaxy. It is generally believed that the appearance of the Milky Way is very similar to Andromeda, and both of them dominate the local galaxy group. The diffuse light of Andromeda galaxy is composed of hundreds of billions of star members. The bright stars around the Andromeda galaxy image are actually stars in our galaxy, which are much closer than the background objects. Andromeda galaxy is also called M3 1, because it is the No.31diffuse object in the list of famous messier cluster nebulae. M3 1 is quite far away, and its light will take 2 million years to reach the earth. The stars in the nebula can be divided into about 20 communities, which means that they may come from smaller galaxies "swallowed up" by Andromeda.