Xiao Yu knew that the dangerous areas in the universe, no matter which civilization it was, were quite deterrent. Xiao Yu once heard Lukka II say that a certain dangerous area in the galaxy caused the Guardian civilization to lose a considerable number of spaceships, and then he didn't hear that the Guardian civilization had done anything other than dividing it into an extremely dangerous area.

In other words, for that dangerous area, the Guardian civilization is also powerless.

The Sweeper's Neutron Warstar manufacturing technology was also obtained from an extremely dangerous area. Come to think of it, when it came to obtaining this kind of technology, the Sweeper civilization must have paid a heavy price.

Xiao Yu also reached the danger zone once, which was a moderately dangerous area in the Aquila Nebula, and it was there that Xiao Yu encountered the powerful beast creature that could survive on the white dwarf. That alien beast, in its heyday, undoubtedly reached the level of level six, which means that even the guardian civilization would feel quite tricky when facing this guy.

Therefore, Xiao Yu believes that an extremely dangerous area should be enough for the Guardian Civilization to give up the pursuit of him. After all, he is only a fifth-level civilization, so he won't let a sixth-level civilization risk chasing after him, right?

In front of Xiao Yu, a white dwarf star and a neutron star are quietly moving. At this moment, Xiao Yu is 40 billion kilometers away from the neutron star. This distance is the limit that can be reached by curvature navigation. If you go any further, you will be affected by the gravitational pull of the neutron star, which may cause accidents in the curvature of the voyage. Therefore, Xiao Yu broke away from the curvature navigation state, and in the conventional navigation mode, the speed of 170,000 kilometers per second was advancing rapidly.

Three hours later, Xiao Yu advanced a distance of 1.8 billion kilometers, and at this time. In the rear, the fleet of the Guardian civilization appeared. Xiao Yu knew that the Guardian civilization that had mastered space technology had the ability to ignore the influence of gravity and sail in curvature within the galaxy, but the fleet of the Guardian civilization did not continue to advance. It was as if there was an invisible barrier ahead of them, allowing them to stay there. This fact made Xiao Yu's mood relax a little.

"They must be afraid of this extremely dangerous area...... Xiao Yu thought secretly.

"Shenzhou civilization, there is a fifth-level extremely dangerous area ahead, if you don't want the race to be wiped out, it's best to come back now. If you could belong to our Guardian Alliance. We will consider not destroying you. At this time, Xiao Yu received a message from the Guardian Civilization.

Xiao Yu simply ignored it, but still maintained his speed and drove forward.

"The Guardian civilization is not chasing after it." In the virtual conference room, Xiao Yu said quietly. "It seems that the Guardian civilization is not willing to enter such a dangerous place. So. We're safe for now. ”

"I don't know weishenme. I always had a feeling of unhappiness. Luca II said with some apprehension, "It seems that in the next moment, something bad will happen." This feeling is very bad, very bad. ”

"After all, this is a level 5 extremely dangerous area, and it is impossible to do without danger." Xiao Yu replied. "No matter what danger there is, it's good to be brave enough to face it. Maybe there is something else here that can give us hope. ”

That being said, the mood of these scientists and Xiao Yu. But there was no relaxation at all.

Hundreds of the most brilliant scientists are all in virtual meeting rooms, ready to respond to unexpected situations. All of Xiao Yu's spaceships were ready to deal with any danger at this moment.

The regular voyage continued, and Xiao Yu was getting closer and closer to the target. Finally, three days later, Xiao Yu arrived at the planet and stopped.

The radiation here is very strong, and the distance between these two planets and their host star, the white dwarf, is only 30 million and 100 million kilometers, and at such a distance, without the protection of a spacecraft, the radiation energy of a white dwarf is enough to kill any living thing.

The distance between this white dwarf star and the neutron star is only one billion kilometers. At such a close distance, the powerful radiation energy of the neutron star can easily reach here. The visible light here is very faint, but in the invisible light band, it is not too much to say that these two planets are being scorched.

This is the first time in more than 10,000 years that Xiao Yu has observed a neutron star so closely. Neutron stars are even more extreme objects than white dwarfs, they are small in size but massive in their mass. A typical neutron star is only about 10 kilometers in diameter, but its mass can reach nearly twice the mass of the Sun. This means an extremely terrifying density.

There is no doubt about the power of the neutron star, such a small thing that is not even as large as the mountains above the Earth, but it has extremely powerful energy.

The Crab Nebula originated from one of the most famous supernova explosions in history, probably during the Song Dynasty in China, which left another moon in the sky visible even during the daytime. The star responsible for this incident was blown to pieces in that incident, and its bones have expanded to the size of eleven light-years. In the center of this vast nebula, there is a neutron star.

This neutron star is a pulsar, its radius is only about 10 kilometers, but its intense radiation illuminates the surrounding space of 11 light-years. Around this neutron star, the gas ejected by the exploding star, the radiation of the neutron star reacts with these gases, and it emits brilliant visible light.

A small thing with a radius of ten kilometers can illuminate space for more than ten light years, and the power of neutron stars can be seen.

Compared to neutron stars, white dwarfs typically have the size of the Earth, 0.6 times the mass of the Sun. Extreme objects such as neutron stars and white dwarfs have a very strange property, that is, the greater the mass, the smaller the volume. A neutron star is much smaller than a white dwarf, so its mass is much larger than that of a white dwarf.

"It's a magnetar." "It has an extremely strong magnetic field, but it's not a pulsar. ”

There are also many types of neutron stars, pulsars and magnetars, both of which are a type of neutron star. Magnetars, as the name suggests, are called magnetars because some neutron stars have an extremely strong magnetic field for some unknown reason.

The magnetic field of a magnetar is very strong, and according to the data, if a human is standing thousands of kilometers away from a magnetar, then all the iron in the human body will be sucked away by the magnetar. The Magneto filmed in the movie is just an insignificant little ant compared to Magnetar.

"Yes, it's a magnetar." Luca No. 3 nodded and agreed with Xiao Yu's statement, and then Luca No. 2 continued: "Master, have you found out?" This neutron star has oddities, and its rotation is too slow. ”

Neutron stars are not visible in the visible light band. Because the temperature of neutron stars is too high, according to the principle of blackbody radiation, the light emitted by it will be X-rays and gamma rays. In other words, even if a human stands in front of a neutron star, he will not see the existence of the neutron star. It's just that in this star system, all kinds of radiation are everywhere, which shows the power of this neutron star all the time. By measuring this radiation, Xiao Yu can easily obtain all kinds of data about this neutron star.

Xiao Yu had long noticed that the neutron star rotated too slowly, and he had tried to explain it, but Xiao Yu found that in his existing theory, he could not make any reasonable explanation for this phenomenon.

The neutron star rotates extremely slowly, about once every three days. This phenomenon is very strange.

Stars have rotation because of the principle of conservation of angular momentum. At the stage when interstellar dust forms primordial stars, due to the collapse of gravity, the interstellar dust brings the power of rotation while converging towards the center, which is the same for both planets and stars. So, it can be seen that everything in the universe is turning.

Huge stars have a rotation, and after a supernova explosion, when part of its mass is ejected and another part of its mass collapses into a neutron star or a white dwarf, its size shrinks by a factor of 10 million, but its angular momentum does not change much, because most of its mass is preserved.

The volume decreases, the mass does not change, and because of the principle of conservation of angular momentum, its rotation must be accelerated. Therefore, the rotation speed of neutron stars is very terrifying, and it can even reach the millisecond level, that is, hundreds of revolutions per second. Among all the neutron stars observed by Xiao Yu, the one with the slowest rotation is about 15 minutes to rotate for one revolution, which is fast enough compared to the Earth.

However, the rotation speed of this neutron star is even slower than one rotation in three days.

It is almost impossible for such a neutron star to exist, the reason is very simple, the rapid rotation brings extremely high centrifugal force, under the action of such a strong centrifugal force, the neutron star can maintain its gravitational balance, keep itself in a stable state, the centrifugal force brought by the rotation of three days and one week is minimal, it is impossible to cancel its own strong gravity, so that it stabilizes. This is a contradiction.

However, although there is no way to explain this phenomenon, Xiao Yu did not feel incredible. Isn't it normal for a place like this, but in a Level 5 Extreme Danger Zone, there is a strange neutron star? (To be continued......)