Lan Ye said: "Hehe, don't be frightened by speculations like 'Dark Forest' or 'Berserker', those are just fiction in fiction after all. Pen | fun | pavilion www. ｂｉｑｕｇｅ。 infoIf there really is a civilization that is far more technologically advanced than humans, if they have mastered the technology of large-scale preparation of antimatter, spaceships can reach more than 10% of the speed of light, and they have begun to colonize the galaxy on a large scale, then in order to obtain enough antimatter energy, they will inevitably build Dyson spheres on many stars. If such a civilization exists, it will indeed pose a great threat to mankind, but the process of building their Dyson sphere will inevitably produce observable astronomical phenomena, since we have not observed the sudden dimming of a star, then its existence can be denied. ”

Avatar Eight: "What if they have mastered more advanced technology and no longer need to get energy from stars?" Isn't that more threatening? ”

Lan Ye said: "It is indeed possible, but if the alien civilization has mastered the real infinite energy such as vacuum zero point energy, no matter how fast their spacecraft can reach the speed of light, or have achieved faster-than-light travel, we don't need to worry, because they have no reason to be hostile to humans." In fact, if such an alien civilization really exists, it is very likely that we humans will always be under their surveillance, but for some reason they have not been in contact with humans. So, if such an extraterrestrial civilization really exists, it doesn't make any difference whether we broadcast or not. ”

Avatar Eight: "Have you forgotten the possibility of a technological explosion?" What if a civilization breaks through controlled nuclear fusion after receiving a broadcast from us, and then technology surpasses us, and then wags war against human civilization? It's not impossible that we don't know what values an extraterrestrial civilization has. ”

"So what?" Lan Ye suddenly laughed.

Avatar Four followed: "By the time this alien civilization receives the information we broadcast, hundreds of thousands of years may have passed. Even if there are thousands of civilizations in the entire galaxy, only our human civilization has broken through controlled nuclear fusion, which is enough to prove the superiority of human civilization, will we be surpassed by a civilization that is a hundred or even thousands of years behind us in technology? Rather, it would be more interesting if there really was such a civilization that tried to turn against us! ”

Avatar Eight: "You Dream Tower people are always so willful, hmph, no matter what, I won't support this plan anyway." ”

Virtual Personality No. 4: "I'm not unfamiliar with your support, there are 3.2 billion people in our 'Dream Tower', hehe, I don't know how many people your virtual personality represents?" ”

Virtual Personality No. 8: "More people doesn't mean it makes sense!" ”

Seeing that the two virtual personalities were about to quarrel, the virtual personality No. 9 said: "Don't make trouble, this is the Star Spirit Network Conference, not a place to quarrel." ”

Virtual Personality No. 4: "That's right, I'm too lazy to fight with you, anyway, just look at the final approval rating." ”

Avatar Nine said to Lan Ye: "Night Emperor, since you have proposed this broadcast plan, you must have a complete implementation plan, what method do you plan to use to broadcast to the galaxy?" ”

Lan Ye said: "First of all, we want to make it clear that the purpose of our broadcast is not only to announce the existence of human beings to all alien civilizations or to play with them, but more importantly, to find a way to pass on the method of achieving controlled nuclear fusion to those alien civilizations that are stuck in this bottleneck." The technology of these civilizations is likely to be only at the level of our 100 years ago or even lower, so the only way to generate signals that can be recognized by civilizations that are far more backward than ours can be recognized tens of thousands of light-years apart, and that requires broadcasting rather than directional transmission, is to use the sun as the signal source, so that the sun's light intensity flashes regularly in the observations of those civilizations. There are two ways to achieve this......"

"The first method is very simple, as early as the 20th century, astronomers proposed that it creates clumps of interstellar dust material in the orbit of the sun, which can scatter the light emitted by the sun to a certain extent. In this way, observing from a fixed point outside the solar system, when there is interstellar dust blocking the sun, it will be found that the light intensity of the sun is reduced, and when this cloud of interstellar dust distributed according to a certain law revolves around the sun in orbit, the regular flickering of the sun can be realized, and the information will be broadcast to the entire galaxy. ”

Virtual Personality Nine: "This method is really simple, and it can be effortlessly implemented with our current level of technology, but there is a drawback, that is, once we release these interstellar dust, we can no longer recover them, we can only let these interstellar dust exist forever, and as these interstellar dust spread, the intensity of the light will also decrease, or it will not be long before it becomes unrecognizable." ”

Lan Ye said: "That's right, that's why there is a second method." ”

Avatar Nine: "And what's the second method?" ”

Lan Ye said three words lightly: "Dyson ball." ”

"Dyson balls?" Avatar Nine frowned and said, "With our current technology, it's impossible to achieve it." ”

Lan Ye said: "Of course, it is impossible to make a Dyson shell that completely envelops the sun like in science fiction, but our original purpose is not to completely envelop the sun, as long as we make thousands of huge solar panels and make them rotate in the orbit of the sun, we can obtain solar energy and achieve the purpose of broadcasting." Of course, this Dyson sphere might be more appropriately called a Dyson cloud. And this has two advantages, first, it solves the problem of the residue and diffusion of interstellar dust, we can adjust the position of these solar panels at any time, so as to achieve the purpose of changing the information we broadcast, and it will not be changed once it is released, like interstellar dust, and the broadcast effect will not weaken over time. Another benefit is that Dyson Cloud allows us to get rid of the current fusion energy technology's dependence on naturally occurring ball lightning, which is equivalent to using the sun as a fusion reactor to obtain far more energy than it does today. ”

Virtual Personality Nine: "It's easy to make solar panels, but the area needed to change the intensity of sunlight is too large, so where can we find so many materials to build a Dyson cloud?" ”