Recently, astronomers from Beijing Normal University came to a conclusion based on a new study called "Communication with Alien Intelligence Civilization" (CETIs) and gave us the answer that there will be no aliens in 400,000 years.
Related research results have been published in the Journal of Astrophysics. Let's analyze the scientific basis of this research in detail:
1. According to the relevant research results in the Journal of Astrophysics, it can be seen that the methodology of scientific basis is to predict the number of civilizations that can exchange CETI among alien civilizations in the Milky Way.
As the only advanced intelligent civilization on the earth, one of the most puzzling problems for human beings is whether our existence is unique. In the past decades, there has been a lot of research on extraterrestrial civilization. The era of modern SETI began in 1960, and Drake (196 1) started the first SETI project in the radio band, namely Ozma project. In addition, Drake later proposed a formula to estimate the number of communication civilizations in the Milky Way, named Drake Equation (Drake 1965).
For decades, we have been wondering the answers to the following questions. First of all, how many CETI are there in the galaxy? This is a challenging question. We can only learn from known data points, but we don't know the average or standard deviation of samples.
Because we don't know the average or standard deviation of the sample, we tested three different coefficients and set important coefficients. Finally, through the formula, we found that the lower limit of the average time interval for any planet to receive signals is 400,000 years.
Second, human beings have no results in exploring alien civilizations by using Mars probes, space exploration programs and other means.
Since the last century, human beings have used Mars probes, radio waves and space exploration programs to explore alien civilizations, and have not found any signs of life on other planets.
In a study published in Astrobiology, scientists believe that the early environment of extraterrestrial planets is very unstable, and primitive alien creatures are doomed to extinction. Chopra and Linnaweaver, astrobiologists, believe that in the early days of planet birth, the environment was very bad, volcanic eruption, toxic gas diffusion and frequent impact of a large number of meteorites made it difficult for life to germinate.
At the same time, scientists put forward the Gaia bottleneck model, that is, the earth needs continuous biological activities to maintain a livable environment. Even though primitive life may generally appear in the early days of planetary formation, these early lives are too fragile to survive for a long time.
There is life in the universe, but it is all extinct. This conclusion may be disappointing, but believe it or not, the universe is there, with life and death. Alien life does not necessarily mean that it will evolve into an intelligent creature like human beings, so don't think that a spaceship will visit the earth one day. However, human subjective philosophy of the universe cannot guarantee the existence of extraterrestrial civilization.
Man is full of curiosity about the vast universe. Although the research says that humans can't find aliens within 400,000 years, we are still facing the fog on the road of exploring alien life, waiting for time and science to uncover the truth.