Life can be said to be the most mysterious thing in the world. How did life appear? Currently, scientists are also actively exploring. Modern science believes that life on Earth may be born from comet . Now we all know that water is the source of life. According to scientists' research, the water resources on Earth should be brought by comets. If we look at this theory, the origin of life on Earth also comes from comets. Scientists believe that in the early stages of the formation of the solar system, the solar system was not stable, and comets flew everywhere, and comets often hit the earth. These comets that hit the earth left a large amount of water resources on the earth, so so many water resources appeared on the earth.
Comet is also called a broom star, because during the flight of the comet, a long tail is always dragged behind it. So how did this tail come about? In fact, this is because when the comet gets closer and closer to the star, the ice crystals on the comet begin to melt due to the rise in temperature. Therefore, we see a long tail dragging behind the comet. This long tail is actually the water vapor after the ice crystal melts. According to scientists' research, there are about 80% ice crystals in the nucleus of Halley's comet , which shows that the water resources on the comet are very rich.
In the early stage of the solar system, a large number of comets hit the earth, thus bringing rich water resources to the earth. In addition, comets not only bring water resources to the earth, but also bringing elements of life to the earth. In 2004, NASA's Star spacecraft once collected some uncontaminated comet dust in space. Later, they brought this dust back to the earth. After analysis, they found that these dust contains a small amount of organic compound glycine. Many friends may not know what glycine is. Glycine is one of the main components of life proteins. According to Darwin 's evolution theory, we can know that all living things on earth evolved from simple organisms.
evolved from the original single-cell organism into multi-cell organism , from multi-cell organism to marine organism , from marine organism to amphibian organism, and from amphibian organism to terrestrial organism. Human beings evolved from terrestrial organism to apes. Human beings have begun to constantly explore the mysteries of the universe since their birth. After thousands of years of technological development, human beings have now had a rough understanding of the universe. Modern science believes that our universe was born 13.8 billion years ago. 13.8 billion years ago, an singularity exploded. The singularity is a point with infinite mass, infinite energy, infinite heat, infinite density, and infinite volume. After this point exploded, our universe began to expand rapidly to the surroundings.
After 13.8 billion years, the universe expanded to what we are now, and the earth is just a planet in the universe. However, the planet on Earth is different from other planets. The planet on Earth gave birth to life. Scientists believe that the reason why the earth was able to give birth to life is mainly because the earth meets the three basic conditions for the birth of life. These three basic conditions are appropriate temperature, sufficient air and abundant water resources. If other planets can also meet these three basic conditions, then the possibility of other planets giving birth to life is also very high. In order to explore alien life, scientists have also made a lot of efforts. Once, 45 years ago, scientists launched the Voyager 1 probe out of the solar system.The purpose of launching this detector is to let it fly out of the solar system and explore the mysteries outside the solar system. However, so many years have passed, the Voyager 1 detector has not completely flew out of the solar system. Scientists calculated that according to the current flight speed of the Voyager 1 detector, it will take at least tens of thousands of years to completely fly out of the solar system. This is really too long for humans. At present, scientists are basically exploring the universe. Observed by astronomical telescope , scientists have discovered many planets similar to Earth outside the solar system, such as Kepler 452b. According to scientists' research on this planet, we can know that this planet is very similar to Earth. The time for this planet to be revolutionized is about 385 days, while the time for the revolution of Earth to be revolutionized is about 365, which means that the time for this planet to be revolutionized is 20 days longer than the time for the revolutionized is earth to be revolutionized.
In addition to these, scientists also found that the mass and light of this planet are very similar to that of the Earth. The volume of this planet is 1.6 times larger than that of the Earth. There is also a liquid ocean on this planet. Now we all know that water is the source of life. The earliest life on Earth was born in water. Since there is a large amount of liquid water on the planet Kepler 452b, it is possible that this planet has life. In addition, scientists have also received wireless signals from the depths of the universe, such as FRB20201124A. This mysterious signal was repeated more than 50 times in a short period of time. Later, after scientists' research, it was found that this mysterious signal came from a galaxy 1.3 billion light years away from the Earth.
And scientists found that there was a significant frequency shift in this signal, which means that the object that emits this signal was moving rapidly, so many scientists speculated that this may be a spacecraft of an alien civilization or a moving planet. Although scientists are not yet sure whether this signal was sent by an alien civilization, scientists believe that alien civilizations should be universally present in the universe. After all, there are too many stars and planets in the universe. Among so many planets, is it only the planet Earth that gave birth to life? This is obviously impossible.
And when scientists observed stars, they found that many stars suddenly became darker. At first, scientists believed that it might be because the lifespan of these stars was about to come to an end, but later scientists believed that the darkening of these stars may be related to alien civilizations. Scientists believed that alien civilizations could build Dyson Ball and then wrap the entire star, thus not being able to do so. The energy of the star is absorbed in the star. For example, in 2011, scientists discovered a star called KIC8462852. This star is about 1,480 light years away from us. During the research, scientists found that the brightness of the star had dropped significantly, as if it was blocked by a huge object. Subsequently, scientists discovered many such stars in the universe, so many scientists speculated that this may be related to alien life.
If alien civilizations really exist, then they may live in the central region of the galaxy, because the development of any civilization cannot be separated from energy. Although there is a lot of energy on planets, these energy are very low-level energy. When civilizations develop to a certain extent, they need more powerful energy, such as using stars, black holes, dark matter, etc. Therefore, scientists believe that if we can fly to the central region of the Milky Way, we may be able to find alien life. However, the famous physicist Hawking once warned humans not to easily contact alien civilizations. After all, we don’t know whether alien civilizations are friendly to us. If alien civilizations are not friendly to us, then if they attack the earth, we cannot resist at all.
I believe that many friends who love astronomy should have read a novel Three-Body . The roughly content is that the three-Body people live on Proxima Centauri, but since the lifespan of Proxima Centauri is about to end, the three-Body people must find a new home.Later, , the three-body man, , sent wireless signals to the universe, but these wireless signals were just received by the earthlings. At the beginning, the earthlings did not want to reply to the three-body signal, but an earthlings secretly replied to the three-body information. Later, the three-body man found the location of the earth through the source of the information, and then found that the earth was a planet that can survive, so he launched an attack on the earth. Since the three-body man's technology is stronger than the human technology, the three-body man quickly occupied the earth. This story tells us not to contact aliens easily.
The editor believes that with the advancement of human technology in the future, maybe we will be able to find alien life soon. The editor hopes that humans can realize these dreams as soon as possible. Do you have anything to say about this?
