Who discovered galactic immigrants in the Andromeda galaxy?

Andromeda is the daughter of Cassiopeia, the fairy queen in Greek mythology. The fairy's head is Cedius, a corner of the Pegasus quadrangle.

[Edit this paragraph] Fairy tales

In Greek mythology, Andromeda is the daughter of King Cepheus and Queen Cassiopeia of Ethiopia. Her mother offended Poseidon's wife, Hai Houxing, because she always showed off her beauty. Neptune wanted Poseidon to avenge her, and Poseidon sent a whale to ravage Ethiopia. Cepheus was frightened and asked for the Oracle.

She was chained by her parents to a boulder on the road, and the sea monster represented by Ceylon constellation passed by. Later, the hero [[Poerxiusi] happened to catch a glimpse of the tragedy, so he immediately took out the head of Medusa, a snake-haired witch, and turned it into a fossil of Ceylon. Poerxiusi killed the sea monster and rescued her.

Later, Andlau Moda gave birth to six sons for Poerxiusi, including Poerxiusi, the founder of Persia, and Gorgo Feng Te, the father of King Tindarius of Sparta.

Andromeda's hands are bound by chains in the original map of Uranographia.

[Edit this paragraph] Constellation characteristics

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.

Among these interesting celestial bodies, it is certain that Andromeda γ is a binary star system, which consists of an orange giant star and a blue small star (as can be seen from the movement of γ star, but it requires some equipment). NGC 752 is also noteworthy. It is a huge open cluster, which contains more than 9, 100 stars, some of which are barely equal to 9, and the brightest is 8.54 (SAO 55080). There is a brighter star in the direction of the cluster, such as 8.07 (SAO 55 10 1), but it is not a member star and just coincides with the celestial sphere. The planetary cloud NGC 7662 can be observed with small equipment.

Important main star

Andromeda α: Alfilaz

Andromeda β: Milac.

Andromeda γ: Alamak-It is a binary star system, the main star is yellow and the companion star is blue.

Andromeda δ: Quezuu

Andromeda ε: Quezon IV

Zeta Andromeda: Quezon II

Andromeda η: Kuisuyi

[Edit this paragraph] Astronomical observation

The best observation month of Andromeda galaxy: 10 ~ 1 1.

The best observation site: 90 N ~ 40 S at 21. Transit date:165438+1October 27th.

Andromeda

Andromeda is also one of the most famous meteor showers. It appears every year 1 1 month, and the peak period of 1 1 month is from 20th to 23rd, and its radiation point is near the gamma star. Andromeda appeared after the head division of comet Bila. Its orbit is every six and a half years. Every two cycles, that is, thirteen years, the place with the densest meteors meets the earth. This is the best time to observe the meteor shower.

Andromeda galaxy

Andromeda galaxy (M3 1), also known as Andromeda Nebula, is about 2.2 million light years away from the Earth, and together with the Milky Way, it is the main member of this galaxy group. Its diameter is160,000 light years, its mass is not less than 3.1*1kloc-0/(which means power operation), and it contains more than 250 billion stars, making it the largest one in this galaxy group.

Andromeda galaxy is located in Andromeda, and the best observation season is autumn. The coordinates of the celestial sphere are right ascension 0h4 1MO, right declination 4 1 00' and apparent magnitude Mv=3.5. It is the brightest spiral galaxy in the whole day and the farthest celestial body visible to the naked eye.

To the naked eye, Andromeda galaxy is a dim and fuzzy oval spot. With a small telescope, we can see the structure including a large nebula and at least two dust belts. The closer to the core, the brighter it is. This core is not big, and the stars in it can be distinguished by a large telescope, otherwise it looks like stars with strong infrared radiation. Andromeda Satellite, two short elliptical galaxies, can also be seen on both sides of Andromeda with a small telescope. They are M32(NGC22 1) of E2 type and M 1 10(NGC205) of E5 type respectively. Andromeda belongs to Sb spiral galaxy with small central area and large spiral arms.

Andromeda galaxy

Andromeda galaxy is the closest galaxy to our galaxy. She is a typical spiral galaxy, but larger than the Milky Way.

Because humans are in the Milky Way, it is impossible to observe the whole picture of the Milky Way, but astronomers imagine that the Milky Way is also a spiral galaxy similar to Andromeda. Andromeda, the Milky Way and more than a dozen other galaxies * * * form a larger galaxy group-the local galaxy group.

Andromeda galaxy ranked 3 1 in the list of distant fuzzy celestial bodies of French astronomer Charles Messier in the18th century, so it is also called M3 1. It is about 2 million light years away from the Earth, with a diameter of 6.5438+0.6 million light years (80,000 light years in the Milky Way). Its mass is not less than 3. 1× 10 1 solar mass, and it contains more than 200 million stars. It is the largest one in this galaxy.

Our Milky Way and Andromeda galaxy are approaching each other, and they may collide in about 3 billion years, and in the process of fusion, they will temporarily form a bright and complex hybrid galaxy. A series of stars will be scattered, and most of the free gas in the galaxy will be compressed to produce new stars. After several billion years, the spiral arms of galaxies will disappear, and two spiral galaxies will merge into a huge elliptical galaxy.

In the cartoon "Saint saint seiya", the instantaneous guardian star is Andromeda.