What's outside the galaxy?

Question 1: What are the extrasolar galaxies outside the Milky Way, what, what, etc? It's actually made up of many things. What's a person's name? Extragalactic galaxies in the Milky Way include Andromeda, Triangle and Auriga. In fact, it is made up of many stars and is called an extragalactic galaxy.

Question 2: What is an extragalactic galaxy? It is a celestial system, located outside the Milky Way, consisting of billions to hundreds of billions of stars, nebulae and interstellar matter. At present, about 654.38+billion extragalactic galaxies have been discovered. The Milky Way is just an ordinary galaxy. It is estimated that the total number of extragalactic galaxies exceeds 1000 billion. They are like islands dotted in the vast ocean, so they are also called "cosmic islands".

Question 3: What is an extrariver system? Extragalactic galaxy refers to a large number of stars outside the milky way, but it is also called "extragalactic nebula" because of its long distance and fuzzy light spots on its appearance.

Question 4: What is the closest extragalactic galaxy to the Milky Way? An international team of astronomers from France, Italy, Britain and Australia recently discovered a galaxy closest to the Milky Way. Computer simulation shows that the Milky Way is now "nibbling away" its weak "neighbors" to strengthen its "power". Astronomers named this galaxy a dwarf galaxy in the direction of Canis. The galaxy is about 25,000 light years away from the solar system and 42,000 light years away from the center of the Milky Way. 1994 The nearest Sagittarius dwarf galaxy was 50,000 light years away from the center of the Milky Way. Because the mass of the Big Dog Dwarf System is only equivalent to 65.438+0 billion suns, the Milky Way with a mass of about 340 billion suns is "relying" on its own size and slowly devouring the stars in the Big Dog Dwarf System, and the swallowing will continue. The report of this observation will be published in the latest issue of the Monthly Journal of the Royal Astronomical Society. The big dog dwarf galaxy itself is not bright, covered by dust and nebulae in the Milky Way, and it is not easy to be observed. However, there are a large number of stars named "M Giant Star" in this dwarf galaxy, which is a large red and cold star with an early formation period and is bright in the infrared band. As a result, astronomers discovered a large number of "M giant planets" under the Milky Way through infrared observation in a research project called "2MASS". These giant planets and other stars form ribbon galaxies, and their positions are quite close to the Milky Way. Astronomers determined the shape and position of this new galaxy by observing the light of these "M giants". According to computer simulation, astronomers also found that some stars in the big dog dwarf system have fallen close to the solar system because of the attraction of the Milky Way. The big dog dwarf system has contributed about 1% of the stars to the Milky Way so far, and it may take billions of years for the Milky Way to completely swallow the dwarf system. At present, some remnants of the Big Dog Dwarf System have formed a ring around the Milky Way.

Question 5: Extragalactic galaxies refer to some seemingly celestial bodies outside the Milky Way. Outside the Milky Way, there are local galaxy clusters, which are wrapped by the super girl galaxy, and there are galaxy clusters outside the super girl galaxy.