The solar system is one of the hundreds of billions of stars in the Milky Way. It is an ordinary star system, and at the same time an extraordinary galaxy. It is ordinary because it is not fundamentally different from other star systems. It is also a star in the center, with varying numbers of planets moving around it. It is not ordinary because the solar system gave birth to the planet of life.
Life is a complex and mysterious thing in the universe, especially intelligent life is even more rare. It has been more than half a century since human beings have entered the space age. Through a large number of observations until now, we have not found any extraterrestrial life, nor have we discovered any extraterrestrial life. Any traces of extraterrestrial civilization.
It can be seen from this that even if there are other lives and civilizations in the universe, they are bound to be very rare, and the birth of human beings in the solar system is no longer ordinary because of the emergence of the earth. The eternal theme of the universe is darkness, coldness and loneliness. Originally, the solar system was also a dead galaxy, but after the birth of life on the earth 3.8 billion years ago, the solar system was given the breath of life.
After a long period of evolution, life on earth finally evolved into human beings millions of years ago. After continuous evolution and development, human beings embarked on the path of science and technology hundreds of years ago. The advent of technology has allowed mankind to plug in the wings of flying, walk out of the earth and see the vast universe.
After human beings walk out of the earth, the first thing they see is the solar system we live in. If we want to understand the mysteries of the universe, we must first understand the mysteries of the solar system and explore all the secrets of the solar system. The solar system is a stellar system. Although it does not appear to be extraordinary, it is the same as other star systems in terms of physical rules and galaxy rules.
Therefore, as long as we solve the various mysteries of the solar system, then we will basically solve the mystery of the star system, which can further our understanding of the universe. There are eight planets in the solar system. The nature we know best is the mother planet Earth. After human beings enter the space age, the first step to explore is the moon. This is an important step for mankind towards the universe.
In the ensuing years, human probes explored Venus and landed on Mars. While the Voyager spacecraft was advancing outside the solar system, it also explored the major planets and successfully passed through the heliosphere. Out of interstellar space.
To understand the solar system, we must first determine the general scope of the solar system, so how large is the solar system? Perhaps in many people’s eyes, this problem is simple. The eight planets are within the solar system, or they can extend to the Kuiper belt a little further.
The Kuiper Belt is a huge belt of celestial bodies surrounding the solar system. There are a large number of asteroids and dwarf planets in it. Pluto, the ninth largest planet, belongs to the Kuiper belt, but Pluto was kicked out of the nine planets by scientists in 2006. It is currently only a dwarf planet.
When human beings just walked out of the earth, scientists divided the scope of the solar system based on the Kuiper Belt, and if they crossed the Kuiper Belt, they even left the solar system. Therefore, many people think that Voyager 1 and Voyager 2 have crossed the Kuiper Belt, and that they have left the solar system and entered the extrastellar space. Is this really the case?
With the continuous improvement of human observation technology, scientists have discovered that there is a spherical cloud layer on the periphery of the Kuiper belt, which surrounds the solar system and is called the Oort cloud by scientists. This spherical cloud has a diameter of 2 light-years and completely envelops the solar system. The comet we often observe comes from here.
After discovering the existence of the Oort cloud, scientists have re-divided the solar system. At present, when we talk about the solar system, we use the Oort cloud as the boundary. Only when we get out of this cloud cluster can we really go out of the solar system. , Into the outer galaxy space. According to the new division, the current Voyager 1 and Voyager 2 are still far from getting out of the solar system. It is conservatively estimated that it will take 15,000 years.
How is such a vast Oort Cloud formed? Is it attracted by the sun’s gravity? Of course not. In fact, the gravitational range of the sun is very limited. What we call the heliosphere is the limit position that solar radiation can reach, that is, it is located in the Kuiper belt. Out of the Kuiper belt, the sun’s gravitational force is basically unaffected, so the Oort cloud is not cosmic dust attracted by gravitational force, so how did it form?
In fact, the Oort Cloud exists longer than the solar system. To unravel this mystery, we must start with the origin of the solar system. Every star system originated in a nebula, and 5 billion years ago, when the sun was not born, the current position of the solar system is a cluster of solar nebulae.
The solar nebula began to rotate rapidly under the influence of a powerful force. At the same time as it rotated, a large amount of matter began to gather toward the center. As time went by, the density of matter in the center became greater and greater, forming a primitive solar celestial body. After the primitive sun was formed, it had stronger gravitational force to accelerate the material that attracted the entire solar nebula, which eventually ignited the nuclear fusion in the center and became The stars.
The formation of the sun consumes most of the material in the solar nebula, and the remaining material forms planets and various other celestial bodies. There were hundreds of planets in the early solar system. Later, through constant collisions, only eight were left. So has the matter of the solar nebula been completely evolved? of course not.
After all, the gravitational range of the sun is limited, while the solar nebula is very wide. The outer material is not pulled by the sun’s gravitational force, so a large area of space is formed between the eight planets and the nebula. It is the current Voyager 1 The space where the number is located, which can also be called the interstellar space of the solar system, has very little matter.
The area of the solar nebula that was not pulled by the sun’s gravity formed the later Oort Cloud, which envelops the solar system. The vast Oort Cloud is of great significance to the solar system. Scientists speculate that the earth can evolve life may also follow This nebula is related.
The early earth had been hit by a large number of comets, and these comets brought abundant heavy metal resources to the earth, and possibly the seeds of life. At the same time, the Oort Cloud is also a powerful galaxy protective cover. If you want to observe the solar system from the outer space, the first thing you see is the Oort Cloud, which can block the attention of the outside of the system. This may also be because the solar system has no outer space. The reason why Star Civilization came to patronize.
Perhaps it is the existence of the Oort Cloud that makes the alien civilization mistakenly believe that this is just a nebula, and there are no galaxies and civilizations. This is undoubtedly good news for mankind. It is important to know that with the current technological strength of mankind, once contact with alien civilization, the huge technological gap, mankind will not have the right to speak at all. If the alien civilization is malicious to humans, then we will have no resistance, and it may finally bring the end of the entire civilization.
Of course, the Oort Cloud also hinders human beings from going out of the solar system, with a diameter of 2 light-years. It is not so easy to go out. It requires our technology to develop to a very high level, at least to achieve controllable nuclear After fusion technology, it is possible to initially have the ability to get out of the solar system. This is actually a good thing to allow mankind to have a safer development environment. Once mankind can get out of the solar system, it means that our strength is no longer weak.