Why do scientists say that humanity will always be bound to the Milky Way?

The earth, as a planet that gave birth to our human civilization, may also be the only planet in the vast universe where human beings exist, with the emergence of spaceships, human footsteps have moved towards the moon and even farther planets, but scientists say that human beings can never step out of the galaxy.

One. The diameter of the Milky Way is 160,000 light-years away, and the Earth is a small sand and gravel in the Milky Way, and some people may not know the meaning of 160,000 light-years. <>

Two. According to the current speed of spacecraft, it will take 18,900 years for human beings to fly out of the solar system, and we must know that our lifespan is limited, and it is a dream to fly out of the solar system, let alone the Milky Way. <>

Three. If you want to survive in the universe, the most important thing is the problem of food and oxygen, even if the speed of the space vehicle will be greatly increased in the future, it will take a long time to fly out of the galaxy, it is difficult for us to ensure that the food, water and oxygen are sufficient, and we never know if we can get out of the galaxy alive.

Four. If you want to fly in space, fuel is essential, and the rocket fuel we currently use is aviation kerosene, which can hollow out the earth and consume all our resources, which are not enough to support us beyond the galaxy.

Five. We don't know if it's safe beyond the Milky Way, and while the Hubble Telescope now has a much larger range than the Milky Way, we don't know if there's any magnetic field at the edge of the Milky Way, and whether we're safe to fly beyond the Milky Way. <>

Maybe in the distant future, human technology is advanced enough, and one day we can go beyond the galaxy, let us look forward to the progress of mankind.

Because the universe is very, very big. And the mysteries beyond the universe are unknown, and it is a big problem for people to break free from gravity, and running outside the earth is only possible for a small number of people, so we can only be bound to the galaxy.

Because the galaxy is very large, it is impossible for humans to get out, and they can only be bound to the galaxy forever.

Because the galaxy is very wide, and there is no technology that can allow humans to leave the galaxy now, since they can't fly, they can only be bound forever.

Explore the mysteries of the universe and expand your mind. Some people say that human beings will never be able to get out of the galaxy, I think this is not necessarily, first of all, we must believe in ourselves, believe in human science and technology, we can't say that we will never give up, we can only say temporarily, for the time being, human science and technology have not yet created devices that speed of light and faster than light, but this is not equal to the future.

<> is known to have a diameter of about 2 light-years for the solar system and 200,000 light-years for the Milky Way. The distance of 1 light year is about a trillion kilometers. It takes 100 million years for humans to walk.

Seeing this set of data, it is difficult to get out of the solar system at present, and it is true that it cannot get out of the Milky Way, now there is only waiting, and one day, human beings successfully study the speed of light, and suddenly get the speed of the spacecraft or superluminal rocket, and the test is successful, the speed of the interstellar travel spacecraft reaches 500,000 kilometers per second, the motherland is jubilant, and people are jubilant.

I wish mankind the realization of great dreams, and also hope that the solar system is 2 light years away, and you can go to Neptune on a rocket ship, and you can easily explore the edge of the solar system. There are no surprises on Earth about whether there are alien walls isolated by unitary channels, such as what black hole gates must be passed to enter the Milky Way and other galaxies. The Milky Way is a bar spiral galaxy of stars, planets, moons, asteroids, comets, and nebulae with a diameter of 160,000 light-years.

There are countless star systems in the Milky Way, and at the center of each star system is a star, the one we see in the night sky, about 400 billion of them. Our Sun is one of them, located thousands of light-years away, on the Orion cantilever of the Milky Way. It orbits the center of the Milky Way at a speed of 220 kilometers per second, which is fast but takes more than 200 million years to complete.

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Because the Milky Way is so big and there is a cosmic wall on the periphery of the Milky Way, some people say that humans will never be able to fly out of the Milky Way.

Mainly because the Milky Way is so big, and much bigger than we thought, that our technology is not yet able to explore it.

This is because the Milky Way is very large, it can be said that it is equivalent to 10 billion of our earths, and no matter how much human development develops, it will not be able to fly out.

1. The earth is not a prison set up by aliens to imprison humans, because there are no aliens to supervise us. 2. Aliens are the collective term for humanoid life outside the earth. Although many people have always claimed to have witnessed aliens visiting the earth and even having contact with themselves, most scholars and experts believe that the so-called different degrees of contact between human beings and aliens are actually psychological effects, and the chances of human beings discovering "aliens" are very small, even if they find the existence of aliens, it is almost difficult to have any contact with them.

In the past 50 years of searching, astronomers have not found any conclusive clues about aliens. But theoretically, it is almost certain that there will be other intelligent beings in the universe. As for whether humans have the opportunity to come into contact with it, it is unknown.

3. As of 2015, the scientific community generally believes that "life only occurs on planets around stars that emit light and heat, but not all stars necessarily have planets". Nebula theory holds that stars were formed from the contraction of a rotating primordial nebula. During contraction, the rotation is accelerated by the conservation of angular momentum, and the nebula gradually becomes flattened due to centrifugal force.

When the central temperature reaches 7 million degrees, there is a thermonuclear reaction that converts hydrogen to helium, and the star is born. In the process, the outer part of the disk condenses into several small celestial bodies - planets.

According to the latest reliable data from scientists, the Milky Way is a huge spiral galaxy with a diameter of about 160,000 light-years. In a galaxy of this size, there are about 2000 to 400 billion star systems like the Sun. Our Sun is just a drop in the ocean in this galaxy.

It is located near the edge of the Milky Way, about 26,000 light-years from the center of the Milky Way. Whenever we mention that the solar system and the Milky Way are so vast, we always have a question in our hearts, is it really impossible for us humans to fly out of the galaxy? Are we humans really prisoners in galactic cages, as some scientists claim?

During the short period of civilization's existence, there was no way out of this cage.

Today we will use some astronomical data from the Milky Way to solve this problem. Are we really prisoners in the galaxy? At least for now, the answer is that with our current level of technology, we can't get out of the galaxy.

Let's take the simplest example. In the case of Voyager 1, it is the farthest probe we have ever flown and it has been flying for more than 40 years, but it is only 22 billion kilometers away from Earth. So when you get to that number, you might feel like you've gone far enough, but compared to the diameter of our solar system, which is about two light-years or so, that doesn't seem impressive.

At Voyager 1's speed, it would take about 17,000 years to leave the solar system.

<> 17,000 years from now, we still don't know what will happen to us on Earth. It is quite possible that after 17000 we will become extinct, or it is possible that after 17000 we will reach a higher level of technology. We say that the shape of the Milky Way is a spiral disk structure, and here you may have a question.

Since the Milky Way is about 160,000 light-years in diameter, can't we humans try to fly directly to it? Of course, from a vertical point of view, its diameter is naturally much smaller than that of the Milky Way. But this thickness must be around 3,000 light-years, and even at Voyager 1's speed, it would take 53 million years.

What's more, Voyager 1 is traveling at only 17 kilometers per second, which would put it below the fourth cosmic speed.

Human beings are not, through the continuous efforts of human beings and the continuous development of science and technology, human beings will one day fly out of the galaxy.

I don't think I'm a prisoner, I think I'm sure I'll be able to fly out of the galaxy, but humans can't do it now.

Sometimes it feels human.

It's just being trapped.

Prisoner of the earth, the future.

If we try to fly at or beyond the speed of light, we could escape the galaxy. ”