The Milky Way is even older than the universe? Scientist: unbelievable

/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. Later, the Englishman Wright put forward the concept of the Milky Way and described its shape in detail. He assumed that the Milky Way is a lens in which many stars, including the solar system, are located.

/kloc-in the 8th century, the famous British astronomers Herschel and his son verified Wright's conjecture. Herschel and his son found many stars in the center of the Milky Way. On the contrary, the farther away from the center, the fewer stars. Through their observation, it is concluded that the Milky Way is indeed a star system with a limited range, and the sun is very close to the center of the Milky Way. The measurement results show that the Milky Way is very large and can accommodate 300 million stars, with a diameter of about 8,000 light years and a thickness of about 1.500 light years.

After Herschel and his son made these data public, some scientists represented by Herschel suggested that the sun was the center of the Milky Way. 19 15 years, American astronomer Capri studied the star changes of many globular clusters and found that the sun is just an ordinary star in the Milky Way, not in the center of the Milky Way. It is 50,000 light years away from the center. Facing Sagittarius, the scope of the Milky Way has been updated. This time, the scientists came to the conclusion that it is far more than 300,000 light years away from Herschel and his son.

In the 1980s, the data of the Milky Way was updated again, that is, the mass was equivalent to 200 billion suns, with a diameter of about 80,000 light years and a thickness of about 2,000 light years, and the sun was about 2.5 light years away from the center of the Milky Way.

The observation of the Milky Way has never stopped. Some scientists have pointed out that the Milky Way galaxy is embedded in a huge low-density galaxy corona, that is, the silver corona.

Astronomers have theoretically proved the existence of galactic corona. Because the Milky Way attracts the Andromeda galaxy to run towards us at a speed of 300 kilometers per second, it requires that the mass of the Milky Way should be at least1000 billion solar masses, which further shows that the Milky Way should have at least a galaxy crown extending beyond 80,000 light years, but many scientists still don't believe this assumption.

With regard to the age of the Milky Way, the current popular view is that the Milky Way was born shortly after the Big Bang. Calculated by this method, the age of the Milky Way is about 65.438+0.45 billion years old. The scientific community believes that the "Big Bang" of the birth of the universe occurred about 654.38+03.7 billion years ago. According to the research report of the European Southern Observatory, it is estimated that the age of the Milky Way is 65.438+0.36 billion years old, almost as old as the universe.

In recent years, a group of astronomers discovered beryllium in two stars of the globular cluster NGC6397 in the capital. This discovery enabled them to advance the alternation time between the first generation of stars and the second generation of stars by 200 million to 300 million years, thus estimating the age of globular clusters as 134 8 billion years, so the age of the Milky Way will not be lower than 136 8 billion years.

However, how old the Milky Way is, what it is made of, and its countless secrets are still an unsolved mystery.

# Galaxy # # Universe and Science # # Popularize Science #