Since the exploration of the universe, human beings have been looking for the existence of extraterrestrial life, but decades later, we still have nothing. We still have not found the existence of extraterrestrial life in the universe. Is it true that only the earth has life in the universe? Of course, scientists don’t think so. The universe is so vast, with countless planets. Even planets like the earth have countless planets. It’s impossible that only the earth has life.
Scientists believe that life may be ubiquitous in the universe. The reason why we can’t find it is still related to human science and technology. Our observation technology is limited. Even if there is life on the planet, we can’t find it. We can only observe the planets outside the solar system through the astronomical telescope. We can only see a general picture. We don’t know what the specific situation is on the planet. The planets that we have the ability to explore in the field can only be found in the solar system.
Water is the source of life. Scientists have been looking for water as a breakthrough in the search for extraterrestrial life. In fact, there are not many planets with water in the solar system, but many of them are frozen water. Several of Jupiter’s moons have a lot of water. Although it is solid water, scientists believe that under these ice layers, which are tens of kilometers thick, there may be oceans with liquid water. There are more kinds of organisms in the earth’s oceans than on land. Then the oceans under these ice layers are larger than the earth’s oceans, and there is a great probability that there is life.
Titan, the largest satellite of Ganymede, is a very special planet. It is the largest satellite in the solar system. At the same time, it has a thick atmosphere. Titan is mainly composed of nitrogen. Under low temperature and pressure, a huge ocean of liquid methane has formed on the surface of the planet. In addition, there are a lot of organic matter. Scientists believe that there may be a dependence on methane in Titan’s methane ocean It’s a living organism.
In addition to earth, there are Venus and Mars in the habitable zone of the solar system. Mars is the most concerned planet for human beings. On Mars orbit, there are not only human probes monitoring all the time, but also Mars rovers on the surface of Mars exploring constantly. Although scientists have not found any signs of biological activity on Mars, they have found the existence of water on Mars.
A few days ago, NASA just announced a huge discovery on Mars: the discovery of liquid water under the Martian ice, which makes scientists firmly believe that there is a liquid ocean under the surface of Mars, and Mars is also a planet that humans may choose to emigrate in the future. If there is a lot of water on Mars, it will be of great significance for humans to transform Mars and realize human migration to Mars It is of great significance.
Scientists speculate that Mars was a beautiful green planet like the earth a long time ago. It also had the existence of life. Later, Mars’s magnetic field disappeared, the surface water dissolved and escaped, and the atmosphere became thinner and thinner. Finally, it became such a desert planet.
After Mars, let’s talk about Venus. If we want to say which planet in the solar system is most similar to the earth, it must be Venus. Venus is the Sister star of the earth, and its volume and mass are very close to the earth. However, today’s Venus is the hottest planet in the solar system, with a surface temperature of 460 degrees. Venus also has a thick atmosphere, the main component of which is carbon dioxide, and the surface temperature is high Atmospheric pressure is 96 times the atmospheric pressure on the earth’s surface. In such an environment, life is difficult to survive.
Although Venus is now a purgatory planet, scientists believe that long ago Venus was no different from the earth, with water, atmosphere, magnetic field and even the existence of Venus civilization. But later I don’t know what happened, Venus atmosphere is full of carbon dioxide, greenhouse effect makes Venus temperature higher and higher, water is evaporated, the surface slowly turned into a oven.
Venus’s environment has also sounded an alarm to the earth. The temperature of Venus is so high because the concentration of carbon dioxide in its atmosphere is too high. With the emission of various kinds of waste gases such as industry and the continuous destruction of the environment, the depth of carbon dioxide in the atmosphere is getting higher and higher, which leads to the greenhouse effect and the rising global temperature. If the environment is not well protected, the earth may become a golden star in the future.
It can be seen that there are still many planets with life in the solar system. Scientists believe that Mars is the most likely planet to discover extraterrestrial life for the first time. The Martian environment makes it easier for human beings to land and explore. Now liquid water has been found. When NASA’s latest Mars rover lands on Mars, it will drill Mars and sample the soil under the surface of Mars. Maybe this time Microbes will be found in the subsurface soil of Mars.
It will not be too far for humans to land on Mars. Once humans land on Mars, advanced exploration equipment can go deep under the surface of Mars, enter the underground liquid ocean of Mars, and the possibility of discovering life is even greater. Although there is no life on the surface of many planets in the solar system, a lot of frozen water is found. In the liquid ocean under the frozen layer, the flourishing of biological species may exceed our imagination.
Guys, do you think life in the universe is universal? Welcome to comment below.