The old man's words made Tang Feng feel a little unbelievable.

The impact of a supernova explosion is only a few light-years in size, and if the astronomers on Earth hear it, they might not be able to laugh at the old man.

Supernova explosions are no joke, they are one of the few super-astronomical disasters in the entire universe.

The so-called supernova explosion is an extreme cosmic astronomical phenomenon that refers to a violent explosion experienced by certain massive stars near the end of their evolution.

For a stable star, the theoretical upper limit of the core temperature is 6 billion K. Above this temperature, the photon energy emitted by the star's internal matter will be so high that it can be converted into positive and negative electron pairs when it collides with each other, and this reaction will destabilize the star and eventually destroy it in a huge explosion.

The internal temperature of massive stars is much higher than the surface, and some supermassive supergiant stars can even exceed 1 billion megaK in core temperature.

As we all know, the interior of the star mainly relies on the energy generated by nuclear fusion to fight the gravitational force of the star itself to maintain stability, that is, the outward expansion force formed by the release of energy is balanced by the gravitational force of the star. The larger the star, the more energy it needs and the faster it consumes hydrogen. The formed helium then proceeds to fuse to form carbon and oxygen atoms, and the degree of fusion depends on the mass of the star.

As mass accumulates in the inner core of the star, the gravitational pull becomes greater and the raw material for nuclear fusion becomes scarce, and when the force provided by the "degeneracy" between the energy of nuclear fusion and the free electrons cannot resist the gravitational pull, the star will suddenly collapse, reaching a speed of more than 73,000 km/s, and the temperature of the inner core will rise rapidly. Under the action of gravity, the gas smashes into the core at nearly the speed of light, and this process will have a "rebound effect", and the incoming part of the gas spins upwards and blows out of the core. The extrusion of electrons and protons in the inner core produces neutrinos, and when the neutrinos pass through the dense gas, they are partially absorbed, and the gas gains huge energy, resulting in a huge explosion, which produces X-rays, gamma rays, ultraviolet rays, and the gas absorbs heat again, and the temperature rises to millions of degrees.

This reaction is extremely violent, so the supernova explosion will be very bright.

And these so-called "massive" stars usually refer to stars that are eight times the mass of the Sun. The greater the mass, the more powerful the resulting supernova explosion. Generally speaking, a star with a supernova explosion that is more than eight times the mass of the Sun tends to affect the surrounding area of several thousand light-years, and a supernova of this mass will form a neutron star at worst.

And if a supernova with a mass equivalent to 300 times the mass of the Sun were to explode, it would produce hundreds of billions of times brighter than the Sun!

It's like a supernova explosion observed by scientists in China in 2016, which produced a supernova that was 570 billion times brighter than the Sun and 20 times brighter than all the stars in the entire galaxy combined!

It can be seen that the more massive the star, the more powerful it will be when it produces a supernova explosion. When some supernovae explode, the impact can even reach hundreds of thousands or even millions of light-years! There are few astronomical phenomena in the universe that can be compared to supernova explosions.

And back then, the old man Andro was thrown out of the space jump because he encountered a supernova explosion, you can imagine how terrifying the supernova explosion is, and even the folded space can affect or even destroy!

Moreover, in addition to the unstable pair of supernovae that do not leave any debris material after the explosion, usually the supernova can form at least neutron stars after the explosion, and some more massive supernovae will directly form more extreme objects such as black holes after the explosion.

And the old man actually said that in the galactic nucleus of that river system, those supergiants with a mass of 1,000 times larger than the sun not only have an impact range of only a few light years after the supernova explosion, but also cannot form a black hole, which is simply a joke.

But looking at the old man's expression, he was obviously not joking.

The universe is so big that there are no wonders, perhaps it is precisely because the multi-star system formed by millions of supermassive stars is so powerful that even black holes can't resist it, so when a supernova erupts, the ejected material will be directly condensed into a brand-new supermassive star by the gravity of a powerful multi-star system, and the huge power generated by the supernova explosion will also be directly eliminated by this powerful gravitational force, as for the supernova remnants that should have produced a massive black hole, It will also be carved up without a trace by this powerful gravitational force!

Of course, these things are unthinkable to Earth scientists, but on the Covenant side, perhaps this is a common thing, and at most, the super multi-star system composed of millions of supermasses will make these people feel new.

Sure enough, the old man continued: "I really haven't seen this kind of multi-star system composed of millions of supermassive stars before, but this kind of multi-star system will also have a core, and when I receive an obvious call signal there, I think that the source of this call signal should be this multi-star system and the core of this galaxy!" ”

"Sure enough, after ten years of continuous observation of the Covenant, I finally found the source of the call signal in this complex multi-star system. Kid, guess what's the source of that signal? ”

Tang Feng was a little stunned, and subconsciously shook his head.

The old man patted Tang Feng's shoulder with a smile, although he was still wearing a spacesuit, Tang Feng could clearly feel that the old man's mood was very happy.

"Hehe, in fact, I didn't think that the ordinary-looking star was the source of the signal at first, but after continuous observation, I found that other stars in this multi-star system have experienced more than one supernova explosion, but only this star, which looks no different from other supergiant stars, has never had a supernova explosion, and the thermonuclear fusion reaction inside it is also very stable, it seems to be more stable than the interior of ordinary yellow dwarfs!"

"If I hadn't been observing this supermultistar system, I wouldn't have discovered this supergiant that looks ordinary on the outside but is very strange on the inside, so I approached the supergiant in a spacecraft at the great risk of a supernova explosion almost every thirty Earth days. Eventually, on that star, I felt a clearer calling! So, without hesitation, I took control of this supergiant star. I thought it would be very difficult and time-consuming to control such a supergiant star, but it turned out to be much more than I expected. To control this supermassive star, it only took me less than 21 Earth days and almost a thousand core splits to completely control this supermassive star! (To be continued.) )