The earth is a beautiful blue planet. There are tens of millions of kinds of life on this beautiful planet, and human beings are the only intelligent life on this planet. The mission of the birth of mankind is to explore the mysteries of the world and the innumerable mysteries of the universe, among which the exploration of life is one of the important exploration tasks for mankind to go out of the universe.
When human beings walk out of the earth and see the vastness, they will think that human beings may not be lonely. There may be intelligent life like human beings and life planet like the earth in many places. However, because human technology is still very backward, we have no ability to go out of the solar system, let alone the galaxy. Therefore, the only area we can explore at this stage is the solar system.
There is no doubt about the existence of extraterrestrial life outside the solar system, but will there be extraterrestrial life in the solar system? The solar system already has a life planet like the earth. Will there be a second and a third life planet? In order to explore the possibility of the existence of life in the solar system, scientists have sent a number of probes to carry out a series of explorations on the seven major planets, among which Mars is the most expected. Unfortunately, Mars has not found any life until now.
With the continuous exploration of human life on the earth, it is found that many of life’s adaptability to the environment is beyond our imagination. Most of life on the earth lives in suitable environment. For example, human survival needs suitable temperature, sunlight, water and so on, but there are still many different lives that can survive in some extreme environment.
Scientists have found traces of life in some extreme environments of the earth, such as extreme environments, volcanoes and other places with high temperatures. Moreover, the living system under the earth is richer than that on the ground. There are still marine living organisms in the ocean as deep as 10000 meters. The discovery of life in different environments of the earth has given scientists a new understanding of life. It seems that life is far more tenacious than we thought. Where we thought life could not exist in the past, there would always be life.
Therefore, when scientists explore extraterrestrial life, they also expand the scope a lot. They are not limited to looking for extraterrestrial life according to the environmental standard of normal life on earth. Scientists begin to consider the possibility of life on some planets with bad environment, and the possibility of life on the earth or under the ice.
Scientists began to send probes to explore several moons of Jupiter and Saturn. Because Jupiter and Saturn are gas giant planets, the possibility of life is extremely low, but the possibility of life is very high for several of their moons. In particular, there are several satellites with a lot of ice on their surface, such as Europa, Ganymede, Callisto and Enceladus.
There are thick ice layers on the surface of these satellites, and there may be a lot of liquid water under the ice layer. Water is the source of life, so the possibility of life on a planet with liquid water is much greater. Apart from the fact that there may be life on these planets that may have subglacial oceans, there is a satellite that has attracted the attention of scientists. It is Titan.
Titan is different from other satellites. It is the only satellite in the solar system with an atmosphere, and its thickness is not low. May some people say that if there is a thick atmosphere, there must be life? Of course not. Although the existence of the atmosphere is not a necessary condition for the birth of life, the existence of the atmosphere is very likely to form an ecosystem.
The reason why there are wind, rain, lightning and seasonal changes on the earth is closely related to the existence of a thick atmosphere. If the earth had no atmosphere, it would be impossible for the ecosystem to be born. Without the ecosystem, life would not be born, and human beings would not be born. Now Titan has a thick atmosphere above it, which means that Titan is likely to have its own ecosystem.
Through the observation of the probe, Titan does have its own ecosystem. Under the thick atmosphere is an ecosystem world, with lightning and rain. However, the rain on Titan is not water, but methane. That is to say, Titan is a world full of methane, where the liquid recycling material is methane. Preliminary observations show that there are many lakes of liquid methane on Titan’s surface.
There is a methane Ocean on Titan’s surface, because the main components of its atmosphere are nitrogen and methane, and the temperature of Titan is relatively low, so the gaseous methane in the atmosphere is liquefied and falls to the surface in the form of rainfall, forming a lake ocean. Methane is an organic matter. On earth, the main source of methane is microorganisms, which means that methane can also give birth to life.
Will there be special life on Titan’s surface or in the methane ocean? Methane based life? Perhaps in many people’s inherent concept, life on earth cannot do without water, 80% of the material in the human body is water, and so are other creatures. Water is an indispensable material for human beings and most of the earth’s life, and it is an important material for life.
So, will alien life be as inseparable from water as earth life? Maybe not. Maybe life on Titan lives on methane. For these extraterrestrial life, methane is the source of life. Most of the material in their bodies is methane. Of course, this is also possible. There are countless life in the universe. They may not only have different appearance, but also different material composition in the body.
Moreover, each galaxy has an independent system. The life born in the solar system may have many similarities, but the life born in other galaxies may be completely different from that in the solar system. For example, we are carbon based life, while alien life may be silicon-based life.
Whether there is any special life in Titan is still in the stage of speculation. With human science and technology, there is no ability to actually land on Titan for long-term exploration. It is difficult to observe the surface of a planet with a thick atmosphere from space orbit. Only by landing on the surface of a planet through the atmosphere can we really see what kind of environment Titan’s surface is and whether there is life.
However, it is believed that with the continuous progress of human science and technology, we can land on Titan for exploration in the future, land on other planets that may have a liquid ocean under the ice, and go deep under the ice into the ocean to see if there is marine life. At that time, it is possible that humans will find many extraterrestrial life in the solar system. Some of them are similar to life on earth, such as life in the liquid ocean under the ice, and some of them may be completely different from life on earth, such as life on Titan.
Exploring and searching for extraterrestrial life in the solar system is only the first step for human beings to explore life in the universe. When human beings have the ability of interstellar navigation and can leave the solar system, it is the time for us to really explore extraterrestrial life. What is more important for human beings to explore extraterrestrial life is to expect to discover extraterrestrial civilization. Only civilization and civilization can communicate with each other, The renewal of technology makes human civilization grow faster.
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