Voyager 2 came to 65.438+0.827 billion kilometers away. What did you find? A lot of harmful rays are disappointing.

In the thousands of years since the birth of human civilization, the area of the earth is somewhat exaggerated for us. Even in most of the time, we are almost completely isolated from America, Australia and Antarctica. This situation did not change until the era of great navigation.

With the improvement of the "map", people began to realize that our home is a sphere, which is not the center of the universe. The world beyond the earth is much bigger than we thought. For example, people climb a high mountain after going through all kinds of hardships, only to find that this mountain is actually only a tiny part of a larger mountain range, and we simply can't see the scenery behind these mountains.

This may disappoint those who seek the "ultimate answer", but for more people, it is a more attractive way to explore the world. How big is our universe? At present, no scientist can give an exact answer. The universe we know can only be called "Hubble volume", and the remaining space that we can't observe may always be a mystery.

Different people have different views on the birth of the universe itself. Although most scientists now agree that the universe originated from the Big Bang, different schools have different views on the details of the Big Bang, its past and future. Simply put, everyone is trying to get close to the truth in their own way.

In the theoretical physics of the universe, we have many ways to guess and confirm. For example, we can "observe" through optical telescopes and radio telescopes, and we can also infer from various tiny particles in the universe, that is, "seeing the big from the small".

For example, although we can't really measure the size and shape of the universe, we can infer the whole by measuring the curvature of the universe, that is, to determine whether the universe is "curved" or "smooth". The final result is that the universe is infinitely flat, which also proves that the universe is likely to be an infinite space.

If we always only make theoretical analysis of the universe, then in the end, human beings will inevitably enter a "paper talk" situation. Therefore, from the middle of last century, human beings really came to explore outside the earth. Although the places we can reach are limited, we have obtained a lot of valuable information that can not be obtained by theoretical analysis alone, such as what is in space, the composition of lunar soil and so on.

But unfortunately, we have never left the solar system since humans entered space for more than half a century. Even humans themselves have not really reached the "distant planets", that is, the positions of Uranus and Neptune.

Indeed, if human beings want to go to other planets, they should not only consider how to "go" but also how to "come back", that is, it is much more difficult to reach the technical level of round trip. So let's not talk about human's own travel, just look at the farthest places that human-made spacecraft and detectors can reach.

In fact, we can't say how big this "record" will be, because they are still flying forward, such as Voyager 2. 1The probe launched on August 20th, 977 has flown over182.7 billion kilometers.

Voyager 2 also has a twin brother named Voyager 1, but Voyager 2 was behind, but it was launched ten days earlier than Voyager 1, but Voyager 1 was faster, so it went further and was out of the influence of the sun.

However, Voyager 1 also has some design flaws. For example, because it is faster and consumes more energy, when it is close to the edge of the solar system, most of the equipment can hardly operate and can only barely maintain its "life". Therefore, scientists can't get more information from the current Voyager 1 and can only pin their hopes on Voyager 2.

Six years after Voyager 1 was out of the influence of the sun, Voyager 2 also reached the place where Voyager 1 had been. As more functions are saved, we can get more information about it. So what kind of world did Voyager 2 discover at18.27 billion kilometers away? Outside our galaxy, is the universe what we think it is?

In fact, scientists have found that the environment here is worse than we thought, and even disappointing. There is no other reason, mainly because there are a lot of cosmic harmful rays here.

In the whole universe, celestial bodies only account for a very small part, and the rest are almost boundless space. However, even in our seemingly empty darkness, there are many substances that make up our universe, and cosmic rays are naturally a part of it.

Speaking of the name cosmic ray, I believe many people will think of nuclear radiation first, because it is a kind of radiation that will cause harm to human body. But the radiation we detect in the universe is completely different from human nuclear radiation, because although nuclear radiation will destroy our chromosomes and cells, we can't actually feel it because it has no mass.

However, cosmic rays are not such substances. Their full name is charged high-energy subatomic particles, which are accelerated to sub-light speed and have mass in space environment. Under such circumstances, if the human body is directly exposed to cosmic rays, it is equivalent to being penetrated by countless tiny "bullets", and I am afraid my life is hard to protect.

In fact, a scientist once had a serious high-speed particle impact accident, and half of his face was paralyzed. The most surprising thing is that the scientist was only hit by a high-speed particle, but it caused such serious consequences. If people are really exposed to the cosmic environment, the horror can be imagined.

Since these cosmic rays are so terrible, where on earth did they come from? After analysis, scientists found that 89% of these cosmic rays are protons, 10% are helium nuclei, and the rest 1% are heavy elements.

In fact, it is better to say that other substances in the universe come from these cosmic rays than from where, because they will form more elements in the process of colliding with each other, and these elements in the universe will gradually form celestial bodies. In other words, there are countless tiny nuclear explosions in space anytime and anywhere, so it is naturally impossible for human beings to survive.

The reason why we can survive successfully on the earth is because we are protected by the atmosphere and the "solar wind". There is no doubt that the atmosphere protects the environment of the earth. It blocks a lot of cosmic radiation and the invasion of meteorites, so the civilization living on the earth can hardly feel the threat from the cosmic environment.

The solar wind protects the whole solar system, that is, it uses the radiation area of the sun itself to offset the high-energy radiation from space, making our spacecraft and astronauts launched into space safe. Although astronauts also need to bear certain radiation, it is at least the level that humans can bear after wearing spacesuits.

In a series of human spaceflight projects, the spacesuit has almost become the "symbol" of astronauts. So, what role does this seemingly bloated dress play? Generally speaking, spacesuits are divided into cabin and extravehicular. Here is mainly about the spacesuit for extravehicular operation.

One is of course to provide breathing air. After all, for human beings, breathing is a necessary action to maintain life. The second is to adjust the internal and external pressure, because in the vacuum environment of space, our internal organs will burst due to expansion in a very short time; The third is to form a protective layer to prevent harmful rays from "attacking" in space. According to statistics, human beings can't survive for fifteen seconds in the cosmic environment, so spacesuits are very necessary.

However, after Voyager II sent back a series of information about the outer solar system, we found that the spacesuit used before may not conform to the future development of mankind. Because our current spacesuit can only protect the radiation inside the solar system at most, facing so much radiation outside the galaxy, the current spacesuit can be described as "useless".

So while studying how to leave the solar system, we should also study how to survive in the environment outside the solar system, whether it is our spaceship or our astronauts. After all, human beings can't just be satisfied with the present living environment, but must look for a more distant home.

Will the future of mankind lie outside the solar system? At least according to a series of existing studies, the planets in the solar system cannot meet the resource needs of human beings and it is difficult to immigrate. In the future, we will continue to explore outward, looking for "Earth-like planets" that can provide mankind with a second home.

Therefore, while constantly enhancing our theoretical knowledge about space, human beings also need to make their practical skills stronger, so as to truly "feel" what the outside world is like, find out those problems that we have not solved before, and start research.

The earth where human beings live is just a drop in the ocean in the universe, but our research has never stopped. Today's human ability has greatly exceeded our own limits, which is undoubtedly the result of wisdom.

I believe that as long as we can continue to use our wisdom correctly in the future, human civilization will continue to develop and reach a level we can't imagine now. At that time, the problems that plague us now will no longer be "problems", but will only be completely overcome by human beings like the small obstacles set by nature today.