Analysis from three aspects, the reason for not finding aliens

The radius of the human observable universe range so far is about 46.5 billion light-years or so.

And in the entire universe, similar to the galaxy like the Milky Way galaxy at least about 172 billion or so. Among these 100 billion galaxies, there are at least 200 to 400 billion sun-like stars inside each galaxy.

So in the face of such a huge number of galaxy systems, do you think there is a possibility of extraterrestrial civilization in this universe?

According to the expansion factor of the universe and the development speed of human technology to estimate. It is extremely difficult for humans to fly out of the Milky Way, so it is almost impossible to detect the universe beyond the Milky Way, so we shorten the field of view to the Milky Way.

To study whether there is an ecosystem similar to the Earth inside the Milky Way galaxy. The age of the birth of the Milky Way is about 13.6 billion years, which makes our Earth particularly young compared to its 4.6 billion years.

There are about 200-400 billion Sun-like stars in the Milky Way, and among these 200-400 billion stars, we can filter out about 20 billion Sun-like stars, which are very similar to the Sun. Around these Sun-like stars, there are about 11 billion Earth-like planets in the habitable zone.

This means that there are about 11 billion planets in the Milky Way that have very similar ecosystems to Earth.

So let's think about one question: with so many similar ecosystems to Earth, wouldn't there be extraterrestrial civilizations? The probability of the existence of extraterrestrials is extremely high, both in terms of probability and other factors.

According to Kardashov's index, he divided the human civilization level into four levels: level 1 civilization can use all the energy of the planet where it is located, level 2 civilization can use all the energy of the star system where it is located, and level 3 civilization can use all the energy of the whole galaxy-like galaxy. And the fourth level of civilization is beyond imagination and can use all the energy of the entire universe.

I wonder if you have watched a movie called Moonfall, which was released on March 25, 2022? This movie is about a level 2 civilization using Dyson spheres to suck energy from star systems, so scientists are so clear about civilization levels, so where exactly could these civilizations be?

Why have we not been able to find them or hear anything from them so far?

Below I will give you three reasons why aliens cannot be contacted that are recognized in the scientific community.

The first is the stated non-existence of aliens. Scientists who support this statement believe that it is extremely fortuitous that life arose on Earth. It is an extremely low probability event.

There are many conditions necessary for the formation of life: plenty of sunlight, plenty of water, and the right amount of oxygen. Protection by an atmosphere. Surrounded by a moon like a moon can withstand the invasion of alien planets. All the conditions to produce life are missing. Even if they are extremely similar.

The second speculation is that some scientists believe that there are indeed aliens in the universe, but that these aliens are too far away from our planet, so far that we cannot contact them, and we have talked about similar topics before, to give you a simple example.

What does it mean that in 2019 humans photographed for the first time a black hole about 55 million light years away from our planet?

It means that at that time scientists captured the image of this black hole is state of this black hole about 55 million years ago. Because the speed of light also requires a certain process, although the speed of light is 300,000km per second in our view on Earth humans are already very fast, but the speed of light compared to the entire universe may be just turtle speed.

The diameter of the Milky Way galaxy is about 100,000 light years. So if humans want to rely on the speed of light to fly from one end of the galaxy to the other, then it will take about 100,000 years, assuming that there is an alien in a place 100,000 light years away from us, using electromagnetic waves to transmit signals, to reach us is already 100,000 years later.

Let's review the age of our human birth. From the fossils that have been excavated, it is inferred that upright walking humans were born only about 400,000 to 500,000 years ago. And there are written records of humans for only about 5000 years.

Humans who discovered that electromagnetic waves could be used to transmit signals were only about 100 years old. Now the answer to the question seems to be solved, if there are aliens, they are too far away, even if they send us a signal 55 million light-years away, to reach us is already 55 million years later. By that time, the other side's civilization may have been destroyed, and our Earth's civilization may have been destroyed, so the distance that can correspond to the time is also very coincidental and not easy to accomplish one thing.

The third reason why aliens cannot be found in the law of the dark forest that we mentioned before. Scientists who support this deduction believe that there is a good chance that aliens exist, but even if there are aliens, it is likely that the other side of the civilization level is lower than ours or similar to us, they may have received our electromagnetic signals, but they do not dare to easily go to reply to our Earth humans, because they are also afraid of being wiped out by our civilization.

This is like what Stephen Hawking once said, do not try to contact aliens, and do not try to reply to the electrical signals sent to us by alien civilizations. Two hunters in the same forest, without knowing each other, are afraid to lightly reveal their identity as well as their location, once exposed, it is likely to be the object of being killed.