Why can’t humans find aliens?

For such a vast universe, we humans are simply too lonely, so lonely that we desperately want to find alien life forms like us.

In 1972, human beings released a cosmic probe, and an aluminum plate was placed on the probe, which clearly marked the position of the solar system in the universe.

And on this aluminum plate, scientists also marked the appearance of human beings on earth, which are divided into male and female.

In 1977, the United States launched the Voyager 1 probe, and in the process of launching the probe this time, scientists carried a gold-plated record on it. This time, the earth information marked on this gold record is more accurate.

During the entire flight, the gold-plated record has been continuously playing the music recorded on the radio.

Here is a simple little popular science for you. Some friends may ask why it is played by radio and not by sound?

What we can be clear about is that it is in a vacuum environment in outer space, and it is impossible to hear the sound even if it is played, so it can only be played by radio.

As of 2017, the Voyager 1 probe has traveled a distance of 18 billion km from our earth.

It is the farthest probe ever flown by humans. Scientists recorded 55 earth languages in this gold-plated record, including our Chinese language, among which there are Shanghai language, Beijing dialect and Cantonese dialect.

Greeting messages were sent to aliens in different languages.

Because when scientists originally designed this golden record, they thought that there was always a language that might be of interest to aliens, and that aliens might successfully decipher.

There are also 90 kinds of earth music recorded on this golden album, including the mountains and rivers in ancient my country and the jasmine flowers in modern times, which are all the best music in China.

But it has been played for decades and has not received any response so far.

Speaking of aliens, let’s analyze from another angle, why we can’t detect aliens.

We all know that if we want to detect aliens with the most advanced technology, we must first have a solid grasp of radio technology, and the earliest history of us humans mastering radio was Marconi in Italy in 1901.

He was the first person to study radio.

That is to say, in 1901, the radio that Marconi sent out, until now, if it continues to spread, then the position reached by the radio at that time is only 121 light-years away.

No matter how advanced the technology development of our human beings in the future, we can always only lag behind the radio that Marconi launched.

So what does the distance of 121 light-years mean to us humans? We all compare the positions of the solar system and the Milky Way, and it seems to be clear at a glance.

The location of the solar system is about 25,000 light-years from the center of the Milky Way. The distance of 121 light-years is simply not worth mentioning for the distance of 25,000 light-years, which is a very small unit of distance.

What’s more, there are about 200 billion stars in the Milky Way, similar to our sun.

The diameter of the Milky Way is about 100,000 light-years.

The distance of 121 light-years is at best next to the solar system for the entire Milky Way. We don’t seem to have even flown out of the solar system.

 

So trying to detect aliens is simply too difficult compared to reality.

All we’re talking about now is analyzing the distances of the universe by radio.

And so far, any kind of aircraft that we humans have researched has never reached the speed of light at all.

I don’t know if you have discovered such a phenomenon. In many science fiction or science fiction movies, it is often mentioned that humans can fly at the speed of light. In fact, from a theoretical point of view, this is actually achievable, but have you ever thought about this? one question.

In order to achieve the purpose of flying at the speed of light, the mass of the object must approach 0.

That is to say, only photons can achieve this goal, and even electrons can only reach about 70% of the speed of light.

Naturally, it is impossible for us humans to achieve this goal. If humans want to achieve the goal of flying at the speed of light, then they need to disintegrate their bodies and disintegrate into compounds. Obviously, the mass is too heavy to achieve the goal of the speed of light.

Disintegrating atoms is still not enough. Disintegrating into electrons can only reach about 70% of the speed of light, and disintegrating into photons can achieve the goal. So have you thought about future problems?

Even if we humans can disintegrate into photons, how will we come back after 1000 years of flight?

It’s another problem, so looking for aliens seems to have always been a creepy and bizarre topic for us.

We are like creatures imprisoned on the earth. We have no way to escape the solar system, and aliens also have no way to reach our earth, because this universe is simply too vast, so vast that it subverts our human cognition.