Andromeda is a constellation _ Andromeda is a constellation?

Andromeda is one of the 88 constellations in the whole day, but it does not belong to the twelve constellations.

Andromeda is one of the 88 modern constellations in Japan and one of the 48 constellations listed by Ptolemy, a Greek and Roman astronomer in the 2nd century. The main star of Andromeda, M3 1 (Andromeda galaxy), is one of the largest members of this galaxy group. In Greek mythology, Andlau Meda symbolizes Andlau Meda, a goddess who is locked on a rock and ready to be swallowed by the sea monster Ceto. Andromeda is the easiest to watch in the autumn night in the northern hemisphere, and there are also constellations symbolizing other gods in Perseus mythology.

Andromeda is located below Ursa major, near Pegasus. The fairy's head is Cedius, a corner of the Pegasus quadrangle. Andromeda, because of its northern declination, can only be seen in the area north of the 40-degree south latitude line, and the area south of 40-degree south latitude will be below the horizon. Andromeda is one of the largest constellations in the celestial sphere, with an area of 722 square degrees, which is 1400 times of the full moon, 55% of the largest Ophiuchus and more than ten times of the smallest Southern Cross.

Characteristics of Andromeda strain

Andromeda has a main galaxy, M3 1 (Andromeda), which is one of the largest members of this galaxy group. Andromeda is characterized by two curves starting from Alpha, and you can easily find it from the connection between Cassiopeia and Polaris.

Undoubtedly, the most famous galaxy in Andromeda is M3 1, which is an extragalactic galaxy and a galaxy as huge as the Milky Way. M3 1 is about 2 million light years away, and it is the farthest celestial body visible to the naked eye.

M3 1 was once considered as a nebula, and the identity of its galaxy was not confirmed by Edwin Hubble until 1924. If we observe with simple binoculars, we can find that M3 1 is surrounded by two companion galaxies: M32 in the south and M 1 10 in the north.

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.

The above contents refer to Baidu Encyclopedia-Andromeda