Maybe we are never alone. There are at least 36 neighbors in the Milky Way?How do scientists know?

"There are at least 36 smart civilizations in the galaxy ... but it takes thousands of years to communicate with each other

Illustration: Galaxy seen from the International Space Station. Skate Keli, a astronaut in the International Space Station, was released on Twitter on August 9, 2015. The explanation of the photo is as follows: "The 135th day in space.#照片. Although the old -fashioned dragon is full of dust, full of gas, full of gas, crooked and twisted, it is bright and gorgeous. One year) "The source NASA/Scott Kelly

According to the latest studies, at least 36 of the galaxy (Jiu Tian Galaxy) we are now located, at least 36 civilizations with smart life.

This study assumes that civilization with communication technology can last for 100 years. If the duration is longer than 100 years, there will be more or even hundreds of possibilities of existing hundreds of out -of -ground civilizations.

Exploration of extraterrestrial life will become a clue to know that human civilization may have duration. However, the space of the universe is too broad, and communication with these civilizations may take thousands of years.

In the universe where we live, the state of life outside is actually in a state of rubbing. Therefore, in theory, there may be some high -tech civilizations with communication capabilities with long -distance planets.

The latest research published by the research team of the University of Nottingham in the United Kingdom on June 15, 2020 showed the latest studies published in the academic journal "Astrophysical Journal" that the galaxy alone should have at least 36 alien civilization alone.

Illustration: This illustration is an imaginary picture of a planetary surface outside the solar system. The planet operates around the ultra -low temperature dwarf orbit of only 40 light years from the earth. Picture source ESO/M. Kornmesser

In addition, the value of "36" is only the least prediction. It can be calculated based on the universal communication capacity of the universe in the universe.

The prerequisite for 100 years is based on the time of human beings using wireless communication such as satellites and television (TV) so far. The radio waves sent by wireless communication to the universe can be found and analyzed by the lives of other planets. In the case of more than 100 years of duration with communication capabilities, it is not surprising that hundreds of civilizations are scattered throughout the Milky Way.

The research team of the University of Nottingham assumes that, like the earth, it takes about 5 billion years of smart civilization to have communication capabilities. On this basis, according to the number of planets running surrounded by solar stars, the number of civilizations that may form in the galaxy may be calculated.

Perhaps the wisdom civilization is continuously born in the galaxy. After sending a wireless signal to the universe briefly, it dies and silent. The number of wisdom and civilizations that are still active is based on the average duration of these civilizations.

By exploring the civilization of wisdom creatures outside the earth and understanding the number of wisdom civilizations that are still active in the galaxy, you can get clues to explore the possibility of "how long human civilization can save".

"If the wisdom life exists in every corner of the universe, it is foreseeable that human civilization will also continue for hundreds of years since then." Christopher Conselice said at the press conference, "On the other hand, if there is no other civilization in the Milky Way, it is a bad news for the long -term duration of human beings."

"The most difficult problem in the scientific community"

Illustration: Multiple antennas that constitute the "Allen Telescope Array: ATA) of the radio telescope facilities that explore the signal of outdoor life signals. Figure SETI Institute

Scientists began to listen to the radio waves from the universe a long time ago, but never found signals from civilization from out -of -earth. If there are so many smart civilizations, why don't I hear their whispers?

This question is called "Fermi Paradox". The earliest physicist ENRICO FERMI, a physicist who pointed out this paradox, was famous for his "where are they all?"

At that time, this question of Fermi was thinking about whether the voyage was likely to be sailing. But after that, this question of Fermi became a question of whether there was existence of extraterrestrial life.

There are many explanations about the lustful silence of the universe. Some aliens are saying in hibernation, and they have used completely different technologies to communicate. In addition, there is no interest in contact with humans.

The Research team of Conselishe believes that the planets with wisdom life are too far away, and their "sound" has not yet passed on to humans. According to the calculation of the research team, the average distance between smart civilization and the earth is 17,000 light years, and it is "almost impossible" to realize information sending and accepting human technology.

The research team stated that in order to achieve such a distant civilized communications and receive their echo, human beings must maintain the wireless communication capabilities of 6120. Illustration: This impression depicts the "planet K2-18B", which is the only "Super Earth (Great Earth Planet)" that confirms the water and temperature required for life. Picture source ESA/Hubble, M. Kornmesser

"If you can find civilization with communication capabilities nearby, this shows that the existence of these civilizations is far from hundreds of years, and smart civilization can survive for tens of thousands or even millions of years. Selite said to the Guardian of the UK, "The more civilizations found near the earth, the more a good sign for the long -term existence of human civilization."

Despite this, the possibility of only human beings in the universe is not without. The speculation in the study of Conselisia is based on the time experienced by the birth of life on the earth, the number of "planets that surrounds the solar star track", and the life evolution of life on the earth is expected to send signals to the universe space. The time is estimated.

"From a statistical point of view, this is one of the most difficult issues in the scientific community." The thesis authors wrote, "What we can do is only through the only data point (we) we know now (we) Study and test. "

If you can find out -of -earth civilization, you can get new data points, which will inevitably deepen the understanding of human civilization.

"In the exploration of smart creatures outside the earth, even if nothing was discovered, it was a process of discovering our future and destiny."

By: Morgan McFall-Johnsen

Fy: xiaoc

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