Human beings have not given up searching for extraterrestrial civilization for more than half a century since they left the earth. Whether from the perspective of the vastness of the universe or from the perspective of the age of the universe, the existence of alien civilization is basically certain. Since alien civilization basically exists, why can’t we not find it?
In fact, it is not surprising that humans cannot find an alien civilization. The reason behind it is not complicated. The main reason is that our scientific and technological strength is still relatively weak, and we cannot go out of the solar system to explore other galaxies. If human beings become an interstellar civilization and can explore the entire range of the Milky Way, then it may not be difficult to discover alien civilizations.
It is precisely because humans are still far from interstellar civilization, the area we can explore at close range is limited to the tiny solar system. As for the starry sky outside the solar system, before human beings became an interstellar civilization, we could only observe and analyze them through astronomical telescopes. So can we search for alien civilizations just by relying on astronomical telescopes? Maybe it is also possible.
I believe many of my friends have heard of Dyson Ball, which is a theory put forward by Freeman Dyson in 1960. Dyson believes that when a civilization develops to a certain stage, it is basically certain to fully utilize the energy of stars. To make full use of the energy of stars, it is necessary to build a huge man-made celestial body that wraps the stars to mine the energy of stars. It is the Dyson sphere.
If there is a Dyson sphere around a star, then the light and dark changes of the star will inevitably be very obvious, and the star is a bright celestial body in the universe. The energy radiated by it can travel very far, which can be observed through an astronomical telescope. A large number of stars deep in a distant galaxy. As long as we find that the brightness of a star changes very obviously, then there may be Dyson spheres around the star, and there may be alien civilizations in this galaxy.
So is there such a star with unusually obvious light and dark changes in the universe? The answer is yes. Through observations, scientists have really discovered that some stars have unusual changes in light and darkness. The representative of these is Tabby Star. Scientists speculate based on the Dyson sphere theory that the Tabby galaxy may have at least a second-level intelligent civilization.
So in addition to observing and searching for artificial celestial bodies such as Dyson spheres, what kind of anomaly of stars can we also look for alien civilizations? In fact, it is a good way to find alien civilizations by observing the anomalies of stars. In addition to Dyson spheres, scientists also believe that alien civilizations may dump garbage on stars.
Nuclear energy is a powerful energy source. In the long future of mankind, a large amount of nuclear energy is inevitable. However, the application of nuclear energy will generate a large amount of nuclear waste. How to deal with this nuclear waste? At present, our disposal of nuclear waste is burying, which is a very low-level disposal method, which will also pollute the earth’s environment.
With the continuous advancement of human science and technology, when we enter the space age, the disposal of nuclear waste will go to the stars and dump them on other planets. So which planet is more suitable for dumping nuclear waste? The answer is the sun, which is undoubtedly the safest to fall on the sun.
Humans will dump nuclear waste on the stars, so it is possible that alien civilizations will do the same. With the dumping of a large amount of nuclear waste and other metal elements, the elemental composition of the sun will undergo some changes. Observing the metal anomalies of stars may also help us find alien civilizations. So is there any star with such anomalous metal elements? The answer is yes.
Sixty years ago, Polish-Australian astronomer Anthony Puzbirski discovered a strange star through an astronomical telescope. The star is called hd101065, which is a fast-oscillating Ap star. Through observation and analysis of the spectrum of the star hd101065, it was found that there were too many rare earth metal elements in it. First, the abundance of elements such as iron and nickel is abnormally low, at least one order of magnitude lower than that of stars of the same type. Second, there are other elements: strontium, lanthanum, cerium, praseodymium, neodymium, europium, gadolinium, terbium, dysprosium, holmium, and erbium. , Thulium… and the higher actinides actinium, protactinium, neptunium, plutonium, americium, curium, berkelium, californium and einsteinium.
I believe many of my friends know that nuclear fusion inside stars can only convert hydrogen to iron to this extent, and the later heavier elements of iron require supernova explosions to be generated. However, there are many rare earth metal elements in the star hd101065, which is completely incomprehensible.
The abnormal chemical composition of hd101065 makes scientists very confused and puzzled. In this regard, the scientists put forward three guesses. 1. Scientists speculate that there may be a companion neutron star around it. The neutron star releases strong positron winds and electrons to bombard the heavy elements in the star’s atmosphere, transforming them into heavier elements. However, the results of the current observations have not found that this star has a neutron star companion.
2. There may be element isotopes that have not yet been discovered in theory, such as element 114 (Fl), only about 80 atoms have been observed so far; element 120 Ubn and element 126 Ubh have not yet been discovered. Although their lifespan is extremely short, according to the theory of stable islands, some of their isotopes may have extremely long half-lives. Of course, this explanation is relatively reluctant, and has not been recognized by too many scientists.
3. It may be that advanced intelligent civilizations are dumping trash on this star, and the view that alien civilizations dump trash to stars As early as 1966, the famous physicist Carl Sagan proposed that aliens may be dumping trash on them. Sprinkle “salt” on the stars to attract the attention of other civilizations in the universe.
In 1980, physicists Whitmere and Wright believed that alien civilizations might use their stars as nuclear waste, and we might discover them through such contaminated stars. So does such a possibility exist? In my opinion, this possibility is more reliable than Dyson Ball.
It is necessary to know that the development of every civilization needs to apply a large amount of energy, and the use of energy naturally inevitably produces a large amount of garbage. Before the strength of civilization really becomes stronger, these industrial wastes can only be dumped on the home planet, but once it goes to the starry sky, it becomes really stronger. A large amount of industrial waste will be removed from the home planet and dumped on other planets.
If it is poured on a planet, it will not be a good choice. You must know that this will also pollute the environment of other planets. And when a civilization moves towards the starry sky, the surrounding planets may be transformed into livable homes step by step. A large amount of industrial waste cannot be dumped on the planet, so where should it be dumped? Stellar is undoubtedly the best choice.
You must know that the star itself has a very high temperature, whether it is the surface temperature or the internal high temperature environment, it can dispose of a large amount of garbage, not to mention that the star itself is very huge, and it is the ideal place for civilization to take out the garbage. After a large amount of industrial waste is poured into the star to be decomposed, the composition of the star will naturally change, and various rare earth metal elements will appear.
Therefore, when we observe that a star has an unusually high amount of rare earth metal elements, we must think that there may be a relatively powerful intelligent civilization in this galaxy. Of course, these are just our current guesses. Whether it is the Dyson sphere or the anomalous elemental composition of the stars, if you want to truly determine whether there is an alien civilization, you can only send a probe spacecraft to observe closely. To achieve this goal, for the current human technology, there is still a long way to go.