After the American probe flew to 22.7 billion kilometers, it took a photo and scientists began to reflect.

In 1950s, when the United States and the former Soviet Union launched a "space race", human development entered a new era.

1957, the first artificial satellite in human history was launched; 196 1 year, the first astronaut successfully entered space; 1969, man successfully landed on the moon. Of course, these are just the beginning. 1977, the United States launched the voyager series of space probes, which took the place of human beings and went to more distant places.

Voyager series space probes

Why launch Voyager series space probes? First of all, from the perspective of human understanding of the solar system, although human beings had studied the solar system for many years at that time, it was only confined to the inner region of the solar system, and the world outside the solar system was still blank.

Moreover, at that time, human detection equipment was not advanced enough, and even Jupiter system and Saturn system were very one-sided. Therefore, launching a space probe can help us better understand the main celestial bodies in the solar system on the one hand, and the external world of the solar system on the other.

In addition, humans had been studying alien civilizations for many years. At that time, many researchers believed that alien civilizations must exist and human beings needed to take the initiative to contact them.

Therefore, the launch of Voyager series space probes also hopes that after flying out of the solar system in the future, it will be discovered by an alien civilization in the vast space, and then receive greetings from the earth, thus responding to us.

Of course, the voyager series also lived up to expectations. It not only successfully sent back valuable information from the periphery of the solar system, but also flew out of the solar system and entered interstellar space.

So, in the vast universe, will human beings be lonely? For this problem, NASA has published a photo sent back by a "traveler" 22.7 billion kilometers away from the earth. After reading it, I believe you will reconsider this problem.

22.7 billion kilometers away, Voyager sent back a photo.

This photo was sent back by navigator 1. In this photo, we can see a very inconspicuous little bright spot. However, it is this very small bright spot, but it is our home-the earth.

It can be said that because of this photo of the earth from a distant place, scientists began to re-examine the position of human beings in the universe.

How small is the earth? Although in human eyes, the earth is huge. After all, we live on it for everything. However, even in the solar system, the earth is not the largest planet. Take Jupiter, the largest planet in the solar system, for example, its mass is 3 18 times that of the earth, and its volume is13,21times that of the earth.

Does Jupiter look big? However, many planets in the universe are bigger than Jupiter. At present, the largest planet in the universe discovered by scientists is 320,000 times that of the Earth. Naturally, through data comparison, Jupiter is only a very small existence in front of it.

As a star system, the solar system has at least100 billion-400 billion stars in the Milky Way, and there are many new "star houses" in the Milky Way, in which a large number of stars are bred.

Both the earth and the solar system are very insignificant in the Milky Way, even less than a grain of sand in the desert.

Seeing this, do you think the Milky Way will be the largest existence in the universe? The answer is of course not. The Milky Way is still insignificant in the universe.

You know, at present, the range of the universe detected by scientists is about 93 billion light years, which is the known diameter of the universe, although it is probably just the tip of the iceberg.

What is the diameter of the Milky Way? The answer is 200,000 light years. From the data comparison, the gap is clear at a glance. So how many galaxies are there in the vast universe? The answer is about 654.38+000 billion.

Obviously, even in our eyes, the Milky Way, which human beings seem to never leave, is only a negligible existence in the vast universe. Naturally, the earth, which is very special in our eyes, can be ignored in the vast universe, because there are not a few more perfect planets than the earth, but countless.

Will there be an alien civilization?

The answer to this question is: Will human civilization be lonely? Obviously, at this stage, we have no solution to this problem. After all, although human beings have been searching for alien life in the vast universe for nearly a hundred years, they have never found the answer.

However, because there are so many stars in the universe, it also means that there is a high probability that human beings will not be lonely. Take the Milky Way as an example. Scientists have long discovered that even in the Milky Way, life is everywhere, because there are many more perfect exoplanets than the Earth within 36 light years.

Naturally, life should be everywhere in the whole galaxy. However, why can't humans find an alien civilization? After all, the evolution time of celestial bodies in the universe is different, which means that there should have been life and even civilization in the universe long before the appearance of the earth. Then why don't they come to us

Some people think that this may be because the universe is too big for many civilizations to leave their mother galaxies at present. To put it bluntly, they all think in their own small world, just like when humans look at the starry sky at night, they will think about which star is surrounded by life.

Of course, there is another possibility. Civilization in the universe will be destroyed when it reaches a certain stage. Moreover, according to the laws of the universe, there should be no connection between civilizations, because once they violate the laws of the universe, they will be destroyed. If this is the case, then, will mankind send out a signal to find a response, which will lead to a fatal disaster for mankind in the future? What do you think of this problem? Welcome to leave a message and tell me your opinion!