The Milky Way galaxy is so big, and there are at least hundreds of civilized stars, why haven t we f

Isn't it because the galaxy is so big that we can't find extraterrestrial civilizations?

We all know that the Earth is an insignificant planet in the Solar System, which in turn has a similar status to the Earth in the Milky Way. If we compare the Sahara Desert, the Earth has about the same place in the Milky Way as a grain of sand in the Sahara Desert. This is enough to see how big the Milky Way really is.

Normally, the Milky Way, with a diameter of 200,000 light-years and nearly 400 billion planets, cannot be intelligent life on Earth alone. On June 15, 2020, Spain's El Mundo reported that, according to research by the University of Nottingham in the United Kingdom, the Milky Way galaxy may contain 36 extraterrestrial civilizations. But it is speculated that the nearest extraterrestrial civilization is also 10,000 light-years away from Earth.

According to speculation, the distance between the earth and the sun is only 149.6 million kilometers, and with the current level of human technology, it is impossible to even get close to the sun and observe the sun at close range, so how can it fly 10,000 light-years to observe the existence of alien civilizations on other planets?

You must know that the observation of extraterrestrial civilization is not just a matter of letting people see the planet through some methods, but also needs to go through multiple tests to prove that there is or has existed extraterrestrial life on this planet, and with the current technology of mankind, it will take some time to realize this possibility.

At the same time, even if it is possible to observe the details of the planet, the distance of 10,000 light-years means that when light travels from a potentially living planet to the eyes of an observer on Earth, one may only be able to observe the scene of that planet 10,000 years ago. Maybe the alien civilization on this planet was extinct or still in gestation at that time.

And because the environment of each planet is different, extraterrestrial life forms are not necessarily humanoid, and even if they are observed, it is difficult to judge that they are extraterrestrial civilizations.

The combination of the above reasons leads to the possibility that the Milky Way galaxy has extraterrestrial life, but we have not yet found it.

The distance is too far, human technology is limited, and the distance between stars is counted in light years, and it is difficult for humans to make an object function normally for such a long time.

This is because the scope of the universe that we can reach at the moment is still too small.

Because the Milky Way is too big to fully understand with our current technology, we didn't find it.

Because our science and technology are limited and cannot yet discover life beyond Earth, we need to continue to develop science and technology.

37 pcs. Because the birth time of the earth's civilization should be about 5 billion years, the age of the parent star where the extrasystem civilization is located must be greater than 5 billion years. Second, it should have been born on a rocky planet the size of Earth that lies within the habitable zone around the star.

Third, this star system must have enough heavy elements, such as iron, copper and other metal elements, otherwise it will not be able to develop a similar civilization.

In an article published in the journal Astrophysics in 20, astrophysicists Tom Westby and Christopher J. Concelis of the University of Nottingham in the United Kingdom estimated the number of extraterrestrial civilizations in the Milky Way: there may be at least 36 extraterrestrial civilizations in the Milky Way that are similar to Earth's civilizations and have the ability to communicate with radio.

Method for calculating the number of communicative civilizations in the galaxy: n=n*·fl·fhz·fm· (l t )。

where n* is the total number of stars in the Milky Way; FL is the proportion of stars that are more than 5 billion years old; FHZ is the proportion of stars with suitable planetary systems; fm is the proportion of stars with sufficiently many metallic elements; l is the average lifespan of a communicative civilization, i.e., the average time from the date on which a civilization is capable of radio communication to its demise; t is the average available time for the evolution of (intelligent) life.

In the case of the Earth, it can be estimated as an average of the period from 5 billion years after the formation of stars to today. For example, for a terrestrial planetary system that is currently 8 billion years old, the evolutionary time available for life is 3 billion years.

The above content reference: Xinhuanet - How many extraterrestrial civilizations are there in the galaxy? Scientists have figured out the answer: 36!

The Drake Formula was developed by the American astronomer Frank Drake in the 1960s in the town of Green Bank to speculate on "the number of highly intelligent civilizations on planets inside and outside the galaxy that may come into contact with us."

Drake's formula for calculating the number of extraterrestrial civilizations.

The formula is expressed as n=ng fp ne fl fi fc fl.

Where: n represents the number of civilizations within the galaxy that may communicate with us.

ng The number of stars in the Milky Way.

FP stars have planetary proportions.

ne Number of terrestrial planets in each planetary system.

FL has a proportion of habitable planets where life evolves.

The probability that FI will evolve into highly intelligent creatures.

The probability that FC is highly intelligent and that life is able to communicate.

FL Tech Civilization Duration as a Percentage of a Planet's Life Cycle.

The number of extraterrestrial civilizations.

The number of extraterrestrial civilizations.

Interestingly, these variables all end up having very similar values. A typical formula for data substitution is as follows: n = 4 x x x x x x 3,000,000 = 12000.

This calculation concludes that there are about 12,000 civilizations in the Milky Way. Drake's original estimate was very close to that number, suggesting that there were about 10,000 detectable civilizations in the galaxy.

What is the level of civilization on Earth?

Human civilization is only a few thousand years old, which is actually very short on a cosmic scale. If there are extraterrestrial civilizations in the galaxy, there must have been more than tens of thousands of years of development, and some have become extinct after a certain degree of development. Generally speaking, human civilization, which has just entered the information age, should still be in a relatively early stage in terms of civilization progress.

To what extent can the civilization of the earth develop?

The current level of human science and technology cannot leave the solar system, and there is still a long way to go from space travel in people's minds. So how far can the civilization of the earth develop in the end?

To what extent can the civilization of the earth develop?

First of all, in the period of the first civilization, the initial colonization and exploration of galaxies, mastering most of the chemical periodic table and the laws of the physics of the universe, medical technology can solve the known diseases of the earth.

In the period of medium civilization, it has mastered new energy technology, developed ultra-high-speed engine technology, can carry out extrasolar exploration, find out the chemical periodic table and physical laws in the universe, can initially use galactic materials to obtain the required energy, mature organ reconstruction technology, and initially contact extraterrestrial life.

After that, he entered a higher civilization, mastered the speed of light and time and space travel, understood multi-dimensional space, but the technology was imperfect and the cost was high, he had deep contact with other alien civilizations, joined the cosmic civilization and the same species organization, the integration technology of the human body and chip was mature, the body image changed, and the DNA of the pure human race basically disappeared.

I believe that there is a more advanced civilization in the center of the galaxy, because the current technology of human beings is not particularly developed, so it has never been discovered.

Nope. The universe is vast, and human beings have not found extraterrestrial civilizations, perhaps because our scientific and technological level is not developed enough, or it may be that there are no extraterrestrial civilizations in the universe at all, and even if there is really life, they may all be similar to the early life forms of the earth, and they are all very inferior animals. I believe that in the future, with the continuous development of human science and technology, one day human beings will find the truth about extraterrestrial civilization, let's wait and see!

Probably yes. Because human exploration of the galaxy is not very perfect, many places have not been carefully explored.

How many extraterrestrial civilizations exist, and when will one of them send a message to Earth? A new study seems to provide the answer.

According to a new ** published April 1 in The Astrophysical Journal, there could be as many as 42,777 extraterrestrial civilizations in our galaxy that could touch Earth in the next 2,000 years.

Scientists use probabilistic simulations to estimate the number of extraterrestrial civilizations that may exist in our galaxy, and they come up with a very specific number: 42,777, with a margin of error of -369 to +267.

This value was calculated by Song Wenjie and He Gao, researchers from the Department of Astronomy at Beijing Normal University in China, who used the Monte Carlo method, also known as statistical simulation, to arrive at their conclusions.

Previously, scientists have tried to count the number of extraterrestrial civilizations that may exist in our galaxy. One of the most notable is astronomer Frank Drake, who proposed the Drake equation in 1961 to estimate the number of intelligent extraterrestrial civilizations.

The problem with the Drake equation and other calculations that estimate the likelihood of extraterrestrial life is that there are too many uncertainties. Therefore, the model is based on reasonable assumptions, which may or may not be.

Using the latest information, Song and Gao modeled star formation in our Milky Way, taking into account metallicity and mass, the probability of terrestrial planets forming in the habitable zone of stars, and the probability of life appearing and eventually becoming advanced enough to communicate with Earth.

On top of that, astronomers also took into account the time scales involved in order to conclude how long humans would need to survive to detect extraterrestrial signals.

Their research yielded two main results: one optimistic and one pessimistic. In an optimistic scenario, the researchers propose that there are 42,777 extraterrestrial civilizations throughout the galaxy that will take an average of 2,000 years to communicate with us.

In a pessimistic scenario, the possibility of the emergence of extraterrestrial civilizations is only. That is, there are about 111 extraterrestrial civilizations, and they may not come into contact with humans for another 400,000 years.

Song and Gao said their research could answer questions about the Fermi paradox. In an informal discussion in 1950, physicist Fermi asked why humanity had not received any signals from extraterrestrial life if there were a large number of advanced extraterrestrial civilizations in the Milky Way.

The reason why we are not receiving the signal may be that the current human life span is not long enough", the study reads, and it has been suggested that the lifespan of civilizations is likely to be self-limiting, with many potentially damaging factors, such as demographic problems, nuclear annihilation, sudden climate change, rogue comets, and ecological changes.

It is the most advanced civilization in the galaxy, and its technological level is already at the top of the galaxy, and it can be transmitted to any galaxy at will.

The civilization of the singer is another dimensional civilization, a high civilization, with a civilization index of 450, which is 500 times that of the earth's civilization, and the sign of this civilization is that it has completely mastered the dimensional changes.

The "Three-Body Problem" is a masterpiece that all science lovers and science fiction lovers love to put down. So far, all readers are against making it into a movie. The reason is simple.

The grand sci-fi ** scene and the humanistic environment of the three-person nature are difficult. With the perfect presentation of movies and television, book lovers naturally don't want their love of books to turn into bad movies.