After going out of the earth, human beings have been searching for the existence of extraterrestrial life, but after more than half a century, we still have nothing. Due to the limitation of human science and technology, we are still unable to get out of the solar system. Therefore, the primary goal of scientists to find extraterrestrial life is also to put it in the solar system. At present, the only life planet discovered in the solar system is the earth.
Although scientists have not yet found any extraterrestrial life in the solar system, they firmly believe that extraterrestrial life exists. One reason why human beings have not found it is that our science and technology are relatively backward, and the other is that we may be looking in the wrong direction. The birth and survival of life on earth is inseparable from water, which can be said to be the source of life.
Scientists look for planets that may have life in the solar system, and take the existence of liquid water as an important reference standard. It is the huge liquid water resources on the earth that lead to the birth of life. Life on the earth may also originate from the ocean. When life was born in the early days of the earth, there was no land life. At first, it was only marine life, but later it was Only when a part of life moves from the ocean to the land can there be the evolution and evolution of land life.
So, in addition to the earth, is there a planet with liquid water in the solar system? Many people may think that a large amount of liquid water is unique to the earth, and it is impossible for other planets in the solar system to have a large amount of liquid water. In fact, through decades of exploration, scientists have found that there are many planets with water in the solar system. It can be said that the solar system is a galaxy full of water, but there is only one planet in the solar system with a large amount of liquid water on its surface .
Even if there is water on the surface of other planets, it is only ice, not liquid water, but there may be liquid water under these ice layers. Today we are going to introduce Europa, a moon of Jupiter. As we all know, Jupiter is the largest planet in the solar system. It has many satellites around it. Europa is just one of them.
Although Europa is only a satellite of Jupiter, it also has its own uniqueness. It was discovered by Galileo as early as 1610. It is the sixth known satellite of Jupiter and the fourth largest satellite of Jupiter. Among the satellites discovered by Galileo, Europa is the second closest to Jupiter. Europa is slightly smaller than Earth’s moon, with a diameter of 3100 kilometers.
Europa also has a very nice name Europa, which is a beautiful princess in Greek mythology. Europa is the brightest satellite in the solar system. The reason for this is that the surface of Europa is covered by thick ice, which is about 100 kilometers thick. So many ice layers naturally reflect sunlight very strongly, so it has become the brightest satellite in the solar system.
Europa is also a planet with rocky structure. Although its surface is covered by thick ice, scientists believe that there should also be a metal core in its core, which is the energy source of Europa. Through the observation data of the detector, it is found that the surface of Europa is very smooth and the number of impact craters is small, which indicates that the geological structure of the planet is relatively active.
With active geological structure and internal metal core energy source, scientists speculate that beyond Europa’s thick ice layer, there may be a huge underwater ocean, which may be 96 kilometers deeper than the deepest ocean on earth. With such a large scale of underground ocean, does it mean that there may be life in the ocean?
Scientists believe that Europa’s underground ocean is the most promising place for the existence of life in the solar system, and Europa also has a thin atmosphere, the main component of which is oxygen. However, the oxygen in the atmosphere is different from that of the earth. The oxygen source of the earth is mainly from organisms, while there are two sources of oxygen in the atmosphere of Europa, one is the impact of charged particles, the other is the sun The ultraviolet radiation in the light breaks down the water molecules on the surface of the planet into oxygen and hydrogen. The hydrogen atoms are relatively low in weight, so they escape everywhere and are not preserved. Only the oxygen factor is preserved.
The more scientists explore and study Europa, the more excited and excited they are. It is possible that the hope of human discovery of extraterrestrial life will be placed on this satellite in the future. However, it is not easy to explore the liquid ocean under Europa’s ice. You know, the thickness of Europa’s ice has reached about 100 km. If you want to drill down such a thick ice layer, you have to put it It may not be so easy to do it on earth, let alone on Europa.
Therefore, if we want to explore whether there is life in Europa’s underground ocean, we can only go to Europa to drill ice and explore in the ocean below 100 kilometers deep after we have advanced technology, more advanced spacecraft and ice drilling equipment. As long as we can get into Europa’s underwater ocean and detect the existence of life, it won’t be very difficult.
If life really exists in Europa’s internal ocean, it’s not difficult to find it as long as you can go deep into it. In fact, in the future, Europa may become a place for human beings to live. In some congenital conditions, Europa is stronger than Mars. There is a lot of water and oxygen on it. Human beings can completely build a closed ecosystem on Europa’s ice.
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