Five Hundred and Seventieth Chapters Control Their Own Destiny

But after thinking about it, Lei Tiantang still didn't do it. On the one hand, he was afraid of getting his hands dirty, and on the other hand, he knew that these brain-dead actions were not very dangerous in a short period of time.

Humans emit so many radio signals, has the location of the earth been exposed? The very real problem is that we would like to expose it, but our strength does not allow us to expose it!

Even if the use of radio to transmit signals is only about a hundred years, it means that the radio signal only travels a distance of one hundred light-years. Compared with the vast universe, one hundred light-years is too limited!

And this is only a purely theoretical analysis. In fact, it is difficult for the radio signals transmitted and utilized by humans to fly that far, and the signal strength will gradually become weaker during the propagation process, so that it is difficult to identify them in the end!

Think about the types of signals that humans can detect and receive today. Basically, they are signals when massive celestial bodies have abnormal activities, which propagate outward in the form of high-energy cosmic rays!

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

Compared with cosmic energy, the energy of radio signals emitted by humans is too weak! Similar to neutron star collisions, pulsars, etc.!

Therefore, even if there is an alien civilization, it is difficult to receive the signal sent by humans, 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 human exploration using various detection methods, we can find possible habitable planets within 50 light-years from the sun. There are about 10 terrestrial planets in the habitable zone.

Within a radius of about 100 light-years, we can roughly think that the number is 4 times that, which means that there are about 40 planets that may have life, plus those that have not yet been discovered, should be less than 100.

We know very little about these planets, but anyone with a little scientific common sense knows that the conditions for life to appear on a planet are very harsh, especially complex life. After a few world-destroying disasters, let alone want to give birth to us human beings!

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

"Haha! What are those people doing! To be honest, I won't worry about the situation of aliens facing the earth in a short period of time,

I'm not one of those fools who think the earth is the center of the universe!

The location of our earth is too biased, and the surrounding galaxies are also pitifully rare. If several alien life can be born in such rare galaxies, then the will of the universe is too casual!

If such a situation really occurs, our earth will not be safe and stable, and the aisles have not been discovered by alien civilizations! " Lei Tiantang said with a smile.

It is well known that we live within the spiral galaxy, the Milky Way, the fact that the Milky Way is a barred spiral galaxy, which means that our galaxy probably has two main spiral arms, plus a central bar, which astronomers know very little about. But in such a vast spiral arm structure, where exactly is our solar system located?

The Milky Way is about 100,000 light-years wide, and we are about 250,000 light-years from the center of the Milky Way. It seems that we are not located in the two main spiral arms of the Milky Way, but in a small spiral arm in the Milky Way. The spiral arm we're on is the Orion Arm, also known as the Orion Arm, which is located between the Sagittarius and Perseus Arms of the Milky Way.

The Orion Arm we're on is 3,500 light-years wide and about 10,000 light-years long. Our Sun, Earth, and all the other planets in our solar system are located within the Orion Arm. We're close to the inner edge of the spiral arm. Emphasize, edge! , at about half the length of the arm.

Also known as the Orion Arm, sometimes called the Orion Swan Arm, it takes its name from the constellation Orion, one of the most prominent constellations in the northern hemisphere in winter and southern in summer.

Some of the brightest stars in the constellation and the most famous objects, Betelgeuse, Rigel, the Orion Star Belt, and the Orion Nebula, are neighbors of the Sun, also located within the Orion Arm. That's why we can observe so many bright objects in the constellation Orion.

And the volume of the earth is only 1.3 millionth the size of the sun, and our sun is just a very ordinary star in the Milky Way. There are hundreds of billions of stars like the sun in the Milky Way.

And the diameter of the Milky Way is hundreds of thousands of light years! For humans, the Milky Way is unimaginable, but humans have discovered billions of extragalactic galaxies as large as the Milky Way!

"Yeah! But even so, I am very unhappy with their behavior. What if there is an accident, such as a fleet of a certain advanced civilization passing by our solar system?

Originally, people might not pay attention to an asteroid in such a remote rural area as us during the voyage, but the signals sent by these dead guys were received by them. Such a thing is of course in the long space voyage. is a very interesting thing!

At that time, how should we deal with these alien fleets that came to be interested? Are you relying on those people to kneel on the ground and call Dad to beg for forgiveness? "Kuafu is still very unhappy about such a thing.

"So that's why I'm so desperate to develop space technology. It's not a good habit to sit still. Since I have this opportunity, boss, I should take advantage of it.

Otherwise, if there is a doomsday scene, even if I can save some human beings, but the earth as my home is gone, it will not really become a wandering civilization like the science fiction novel!

This is also one of the reasons why Tian Mingli and the others said that they would build a large scientific instrument such as the Hadron Collider. I agree without hesitation. Although the research on high energy physics cannot be harvested in a short period of time, I am still very optimistic about its future. of.

Antimatter, dark matter, dark energy, and even the fur of space research can also be studied with such equipment, and these things can be used as energy or weapons!

Especially for weapons, I can say with certainty that the time for them to make weapons is much faster than the time to become energy sources. That's what our current nuclear energy is all about!

Thinking that when we master such big killers as antimatter bombs, dark matter bombs, and even space depletion bombs, the threat of ordinary aliens to us will be very small! " Lei Tiantang said with a smile.