Chapter 565

However, to think about it, Lei Tiantang did not really do it. On the one hand, he was afraid of dirty his hands. On the other hand, he knew that these brain damage movements in a short period of time did not have much danger.

Has the position of the earth been exposed since so many radio signals have been sent out? The real problem is that we want to expose, but our strength does not allow us to expose it!

The use of radio to transmit signals, even if it is less than a hundred years, means that the radio signal has only traveled a hundred light-years. Compared with the vast universe, a hundred light-years is too limited!

But this is only a pure theoretical analysis. In fact, it is very difficult to fly so far for the radio signals transmitted and utilized by human beings. In the process of transmission, the signal strength will gradually become weaker, so that it is difficult to recognize them at last!

Think about what kind of signals human beings can detect and receive today. They are basically signals of abnormal activities of massive celestial bodies, which spread out in the form of high-energy cosmic rays!

For example, a supernova explosion produces more energy at the moment of explosion than the total energy of the sun in its lifetime. Even such a high-energy signal is only detected by human beings!

Compared with the energy of the universe, the radio signal energy of human beings is too weak! There are also neutron star collisions, pulsars!

Therefore, even if there is an alien civilization, it is difficult to receive the signal from human beings, because the signal is too weak, even if it is received, it is likely to be filtered out and will not attract the attention of aliens!

From the results of our exploration by various means, we can find the possible habitable planets (earth like planets in the habitable zone) within 50 light-years from the sun. There are about 10 known planets.

Within a radius of about 100 light-years, we can roughly think that the number is four times. In this way, there are about 40 planets that may have life, and those that have not been found should be less than 100.

We know little about these planets, but as long as people with a little scientific knowledge know, the conditions for life on a planet are very strict, especially complex life. If our life on the earth is not lucky, it may have been finished in several exterminating disasters, let alone want to give birth to us!

Therefore, most of them are likely to have no life for various reasons. Even if the rest have life, the probability of developing intelligent life and even civilization is extremely low. Therefore, we are generally safe now.

"Ha ha! Say what those people are doing! To tell you the truth, I won't worry about the situation that the earth will face aliens in a short time. I'm not a fool who thinks the earth is the center of the universe!

The position of our earth is too far away, and the surrounding star system is also very rare. If several alien life can be born in such a rare star system, then the will of the universe is too casual!

If this happens, our earth will not have a stable passageway, and now it has not been discovered by an alien civilization! " Lei Tian Tang said with a smile.

We all know that we live in the spiral galaxy, the Milky way. In fact, the Milky way is a rod spiral galaxy, which means that our galaxy may have two major spiral arms, plus a central stripe, which astronomers know little about. But where is our solar system in such a vast spiral arm structure?

The Milky way is about 100000 light-years wide, and we are about 25000 light-years away from the center of the Milky way. It seems that we are not in the two main arms of the galaxy, but in a small arm of the Milky way. The spiral arm we are in is the Orion Arm, also known as the Orion Arm, which is located between the Centaur arm and the Perseid arm of the galaxy.

It's 3500 years wide, about 10000 years long. Our sun, earth, and all other planets in the solar system are in Orion's arms. We're close to the inside edge of the arm About half the length of the arm.

The Orion Arm, also known as the Orion Swan arm, is named after Orion, one of the most prominent constellations in the northern hemisphere during winter (summer in the southern hemisphere).

Some of the brightest stars and the most famous objects in the constellation (Betelgeuse, Rigel, Orion's stellar belt, and Orion Nebula) are neighbors of the sun, also in Orion's arms. That's why we can see so many bright objects in Orion.

The size of the earth is only 1.3 million times the size of the sun, and our sun is only a very common star in the galaxy. There are hundreds of billions of stars like the sun in the galaxy.

And the Milky way is hundreds of thousands of light-years in diameter! For human beings, the size of the Milky way is unimaginable, but now we have found billions of extragalactic galaxies as large as the Milky way!

"Yes! But even so, I'm not happy with their behavior. What if there is an accident, such as a fleet of advanced civilization passing by our solar system?

People may not pay attention to a small planet in such a remote rural area during the voyage, but the signals sent by these dead guys are received by them. Such a thing is of course a very interesting thing in the long voyage of space!At that time, how could we deal with these alien fleets of interest? Do you rely on those people kneeling on the ground and calling for Dad to let go Kuafu is not happy with such things.

"So that's why I try so hard to develop space technology. It's not a good habit to sit around and wait for death. Since I have this opportunity, boss, I should make good use of it.

Otherwise, in case of the doomsday scene, even if I can protect some human beings, but the earth as home is gone, it will not really become a wandering civilization like the one in science fiction!

This is one of the reasons why Tian Mingli said that they would build a large scientific instrument like the Hadron Collider without hesitation. Although there is no harvest in the near future, I am still optimistic about its future.

Antimatter, dark matter, dark energy, and even the skin of space research can also be used for research, and these things can be used as energy or weapons!

Especially for weapons, I can say for sure that they take much faster time to make weapons than to become energy. That's what nuclear power is like now!

I want to think that when we have mastered the anti matter bomb, dark matter bomb and even the space annihilation bomb and so on, the general alien threat to us will be very small! " Lei Tian Tang said with a smile.

www.novelhall.com , the fastest update of the webnovel!