What will happen to the solar system when the Andromeda galaxy hits the Milky Way? What will be the fate of mankind?

We know that the universe is expanding, and the reason for this expansion is that scientists believe that there are dark matter and dark energy in the universe.

However, even if these dark energies have the power to push the whole universe to expand, gravity is still the dominant force of two or more giant galaxies nearby. Therefore, in the vast universe, the collision and fusion between galaxies is a common phenomenon.

For example, the Milky Way and the Andromeda galaxy closest to the Milky Way are constantly approaching each other, and their speed of approaching each other is 1 10 km per second. At this rate, our Milky Way and Andromeda will collide in about 4 billion years.

I believe many friends are probably curious, what will happen if two galaxies collide? What kind of shocking scene will it be? Let's talk about this topic today.

If we are now at the moment when the Milky Way and Andromeda are about to collide in 4 billion years, what will happen next?

We know that there will be a huge black hole at the core of the galaxy, and the whole galaxy can be dragged around it because of its huge gravity. Of course, at the same time, their own huge gravity will attract each other, which is why adjacent galaxies will approach each other.

When two galaxies are close enough, they will collide and merge, and two spiral galaxies will merge into a completely different new galaxy. Scientists estimate through simulation that the new galaxy will be an elliptical structure.

Some friends will ask, won't the stars in these two galaxies be shattered by collision? In fact, it did happen. After all, this is an active and complex system. It is almost inevitable that some stars will be shattered under a series of conditions such as gravity, orbit and disturbance caused by collision, but not all stars will suffer this fate. After all, there are vast spaces between stars, which are the buffer zones of stars.

Of course, it is conceivable that when two galaxies collide, the positions of stars and even galaxies will shift due to the impact of collision and the interaction of gravity, and our sun and even the whole solar system are no exception. At that time, the solar system may be pushed to the edge of new galaxies. Scientists believe that the optimistic result is that this position may be 26,000 light years farther than before, but it may also be completely pushed to the edge of the Milky Way because it is sitting on the bench.

But in either case, this galaxy fusion is extremely spectacular from the perspective of the earth, and the night sky will be particularly bright. As the collision and fusion continue, the black hole in the center of the two galaxies will eventually merge, and the energy released during the merger, even at the edge of the earth, cannot be ignored, which will be a magnificent sight visible to the naked eye.

Unfortunately, four billion years later, our earth has long since ceased to exist. Because before that, our sun has turned into a red giant and swallowed up the earth. Therefore, if human civilization is not destroyed in such a long time, the option of interstellar migration will be put on the agenda anyway.