The collision between the Milky Way and Andromeda galaxy may be delayed for another 600 million years. What happened?

The universe is vast, and the solar system is just one of hundreds of billions of galaxies with galactic coefficient. Although the Milky Way has a diameter of 654.38+ million light years, it is only a dusty galaxy in the universe, and there is a neighbor outside the Milky Way, the Andromeda galaxy.

As we all know, the earth revolves around the sun and the solar system revolves around the center of the Milky Way, so the Milky Way is naturally not static. In fact, galaxies in the universe, no matter how big, are in motion. Both the Milky Way and Andromeda naturally rotate, so what are these two galaxies revolving around?

According to the research and exploration of scientists, it is believed that the Milky Way and the Milky Way may move around the same center of mass, which is located in the middle of the two galaxies. Therefore, the Milky Way and Andromeda galaxy may be in a relationship of intertwining movement, and it is this movement between them that makes them get closer and closer to each other in the process of circling each other.

Previously, according to scientists' observation, it was thought that the Milky Way and Andromeda galaxy might collide in 3.6 billion years, but some time ago, astronomers from Baltimore Space Telescope Science Institute put forward new observations and research results, arguing that the collision time of the two galaxies will be delayed by 600 million years, and the Milky Way and Andromeda galaxy will collide in 4.5 billion years. What happened?

According to the latest astronomical observations and calculations, it is found that the 1 th rendezvous of these two galaxies will be a passing collision after 3.9 billion years, and then the two galaxies will come back for a real collision after another 600 million years. Scientists have announced that Andromeda and the Milky Way will collide in 4.5 billion years. Many people worry that the collision between them will lead to a large number of stars colliding, which will bring disaster to the whole Milky Way.

But in fact, many people misunderstand the collision between galaxies. Collisions between galaxies are different from collisions between planets. If two planets collide head-on, it must be a lose-lose situation. Maybe both planets will collapse because of destruction. Galaxies are made up of small galaxies and higher and wider interstellar space.

The Milky Way is a huge galaxy with1000 ~ 400 billion stars, and the size of Andromeda galaxy is twice that of the Milky Way. From the numerical point of view, the number of stars in the Milky Way is very large, but when hundreds of billions of stars are distributed in every corner of the Milky Way, you will find that every star exists like dust, and there is a very broad interstellar space between stars, ranging from a few light years to hundreds of light years.

For example, the nearest star system in the solar system is billion, which is about 4.2 light years away from the solar system. The space between two stars so far apart is huge, and the diameter of the sun only accounts for one-eighth of this distance. The distribution of stars in Andromeda galaxy is similar, and they are also far apart. Such an empty space, even if some stars are added, will not affect the stable existence of these stars.

Therefore, when the Milky Way and Andromeda galaxy collide after 4.5 billion years, a series of star explosions will not occur as many people think, and the Milky Way will have a huge vibration. In fact, the collision between two giant galaxies is very mild and there will be no violent reaction. It is not so much a collision as a merger.

After two galaxies collide, the two galaxies will gradually merge and eventually become a larger galaxy. At the same time, the stars, planets and other celestial bodies of the two galaxies will interact and eventually form a stable galaxy system. Some people may ask: What will happen to the black holes in two galaxies? There is a supermassive black hole in the center of the Milky Way, and so does Andromeda.

When two galaxies collide, fusion begins. This process is a long one. Not only do their respective celestial bodies and matter merge and unify, but the black holes in the center of the two galaxies are also naturally close and intertwined. Finally, the two black holes will merge into a larger galaxy.

Scientists believe that the collision and fusion of the Milky Way and Andromeda galaxy is only the first step, and other nearby galaxies will merge in the future, which will make the new galaxy bigger and bigger and eventually become a super galaxy like virgo supercluster. Of course, 4.5 billion years is also an extremely long time in the universe.

At that time, no one knew what the fate of the earth and mankind would be. However, 4.5 billion years later, the sun has already become a red giant, and may have expanded and swallowed up Mercury and Venus. Even if the earth is not swallowed up, it will be close to the red giant. It is difficult for life on earth to survive at such a high temperature. If there were people on the earth at that time, they could only hide outside the surface.

Of course, if human civilization can continue to develop, 4.5 billion years later, human science and technology may have developed to the point where we can't believe it. At that time, relying on strong scientific and technological strength, human beings may have already left the earth, emigrated to a new earth outside the solar system, and even pushed the earth out of the solar system with a planetary engine like a wandering earth.

Little friends, what do you think of this? Welcome everyone to leave a message below to discuss and express their views and opinions.