/kloc-in the 0 th and 7 th centuries, Galileo first discovered the Milky Way with a telescope. He found that this is a region with dense stars.
1750, the British astronomer Wright thought that the Milky Way was flat. He assumed that the Milky Way is a lens in which the center of gravity, including the solar system, is located.
1755, the German philosopher Kant proposed that a huge celestial system might be formed between the stars and the Milky Way. Later, the German mathematician Lambert put forward a similar hypothesis. By 1785, the British astronomer William Herschler drew the flat shape of the Milky Way, and believed that the solar system was located in the center of the Milky Way. Their observations show that the Milky Way is very large, which can accommodate 300 million stars, with a diameter of 8,000 light years and a thickness of 1500 light years.
19 15 years, American astronomer Capri studied the deformation of many globular clusters and found that the sun is just an ordinary horizontal line in the Milky Way, not in the center of the Milky Way. It is about 50,000 light years away from the center, facing Sagittarius, and the range of the Milky Way is about 300,000 light years.
19 18, American astronomer shapley proposed that the solar system should be located at the edge of the Milky Way after four years of observation. 1926, Swedish astronomer Lindblad analyzed that the Milky Way is also spinning, and the observation of the Milky Way has been going on.
1986, two British astronomers Guilmault and Ryder clearly pointed out for the first time that the stars in the silver disk can be divided into two different structures: the thin disk and the back disk. In this way, the composition of the Milky Way is summarized. The main part of galactic matter consists of a thin disk called the silver disk, and the nearly spherical part of the silver disk is called the nuclear sphere. In the nuclear sphere, the density of stars is very high, and a small intelligence bends into the galactic silver disk in its center. Outside, there is a wider and nearly spherical distribution system, in which the material density is much lower than that in the silver plate, which is called silver transport and yin transport, and there is a silver crown outside, and its material distribution is also roughly spherical.
On September 9th, 2006, people's understanding of the structure and dimensions of the Milky Way increased. Marijuana and some people at Princeton University announced that Sloan Digital Sky Survey Company had discovered a huge cloud gas in the sky in the northern hemisphere. This structure is located in the Milky Way, but it does not seem to be suitable for all existing models of the Milky Way. It gathers some stars perpendicular to the cantilever, and the hammer on the disk may be explained by the merger of Pettigrew and Milky Way.
But how big the Milky Way is, what it is made of, what its shape is, and its countless secrets remain a mystery until today.