Looking at the starry sky beyond the earth has been a dream of mankind since ancient times. But in ancient times, due to the lack of scientific knowledge, people did not know much about the stars outside the earth. Many people attributed the world outside the earth to the fairyland or the divine world.
With the rapid development of human civilization, we entered the era of science and technology hundreds of years ago. With the help of science and technology, we understand that beyond the earth is not a fairyland or a divine world, but a vast universe. On October 4, 1657, the first man-made satellite broke through the shackles of the atmosphere and entered space, opening the prelude of human exploration of the universe.
Only when we really walk out of the earth can we know the vastness of the universe and the smallness of the earth. After the prelude of human exploration of the universe, many detectors are constantly leaving the earth to explore in various directions of the solar system. Some people may not understand: why do we spend so much money and resources to explore other planets? Wouldn’t it be more fragrant to put all this money and resources on the earth?
If you have this kind of cognition, it would be too narrow. Human beings spend huge money and resources to explore the universe, just for the sake that human beings can go further and continue in the future. Why? I believe many friends understand that the earth’s resources are not unlimited, but limited non renewable resources.
It took billions of years for the earth to evolve, creating a life world rich in resources. Before the birth of human beings, these resources are basically sealed, waiting for the birth of human beings. After the birth of human civilization, we began to use these resources step by step, especially in the era of science and technology, the rapid development of science and technology needs a lot of resources.
The more powerful science and technology is, the greater the demand for resources is. If we only use the earth’s resources, we can not meet the rapid development of human civilization. Once the earth’s resources are exhausted, we have no other way to obtain resources, then what is waiting for mankind will be the end of destruction.
The resources of the earth are very limited, but the resources of the universe are unlimited. As long as the scientific and technological strength is strong enough, the resources of the whole galaxy and universe can be used by us. In addition, while science and technology bring about a leap in human civilization, it is also constantly destroying the earth’s ecological environment, which is a huge side effect of industrial development.
We can imagine that in the near future, the earth may no longer be suitable for human survival. At that time, if we want to survive, we need to go to other planets and explore the universe. An important task is to find the second and third homes of human beings.
In addition to these factors related to the fate of human life in the future, we have another major goal in exploring the universe, which is to find extraterrestrial life. From the perspective of the universe, the probability of the existence of extraterrestrial life is basically 100%. Before we really find extraterrestrial life, we can only speculate about it.
The existence of other life in the universe has a great influence on the future outlook and development direction of human beings. Because the current scientific and technological strength of mankind is still very limited, we have no ability to go out of the solar system to explore, so we can only focus on the solar system, to see what the planets in the solar system look like, whether there is a second home suitable for human survival? Is there extraterrestrial life?
Through more than half a century of continuous exploration and research, scientists have found three planets in the solar system that are most likely to have life, one of which is Mars, the other two are satellites of the planet, they are Titan and Europa.
These two moons revolve around Saturn and Jupiter respectively. Although they are just small moons, they are very unusual. The possibility of life is higher than that of Mars. Why do scientists think that the possibility of life on these two satellites is very high? It is mainly related to their environment. Let’s make some simple analysis one by one.
Titan, also known as Titan, is the largest satellite orbiting Saturn and the second largest satellite in the solar system. Scientists speculate that it has a high probability of life because it is the only satellite in the solar system with a thick atmosphere, and also has oceans and lakes.
The importance of atmosphere for the birth of life, I believe friends should understand, we often say ecological planet, what is ecological planet? It’s the planet’s surface environment that’s wrapped up in the atmosphere. The atmosphere is equivalent to the protection of a planet. With the atmosphere, the evolution of the planet’s surface can be better developed, and at the same time, it can effectively block all kinds of radiation from the universe.
The role of the atmosphere is too important for a planet, its thickness is directly related to the ecological environment of the planet. It is the thick atmosphere of the earth that can form a beautiful ecosystem and give birth to life. If a planet without an atmosphere, such as the moon, has its surface environment in direct contact with space, it is difficult to form a unique ecosystem, and it is unlikely to give birth to life.
Titan’s atmosphere is relatively thick. Beyond the thick atmosphere, it naturally forms a unique ecosystem, as well as the existence of oceans and lakes. It’s just that the material that makes up the ocean is not water, but methane. The reason is that the main component of Titan’s atmosphere is methane and other gases. In a low temperature environment, they solidify and fall on the surface in the form of rainfall, forming oceans and lakes.
Although Titan’s oceans and lakes are composed of methane, thunderstorms and rainfall are formed due to the existence of the atmosphere and ecosystem, which can promote the transformation of inorganic matter to organic matter, giving birth to the earliest life structure. Through the continuous study of life on earth, scientists have found that the adaptability of life to the environment is very strong.
In different environments, life can evolve into different evolutionary strategies and directions. Alien life does not necessarily need the same ecological conditions as the earth. Even planets with different environments may have their own unique life as long as the conditions are suitable.
Europa is the fourth largest satellite orbiting Jupiter. It also has a thin atmosphere. It is a mild world with a thick ice layer covering its surface up to 100 kilometers. According to the preliminary detection of the detector, its interior may still be a hot core, which can provide heat. So scientists think that beneath its thick ice, there may be a liquid ocean.
Using the material found on Europa’s surface by the probe, scientists speculated that there might be life in its inner ocean world. If there is life here, then the life form may be different from that of the earth’s ocean. Of course, there may be many similarities. After all, life also originates from water.
Exploring the secrets of the planets in the solar system is our first step to the sky. With the continuous development of human science and technology, we are bound to go out of the solar system and into interstellar space in the future. At that time, we will find more interesting galaxies and planets, and the existence of extraterrestrial life will no longer be a mystery. Only when we get out of the solar system can we have more hope to find a natural home suitable for human survival.