"Wow, Lou Song, do you still know this?"

"Well, I also like astronomy knowledge."

Lou Song usually focuses on mathematics, but even if he competes in physics, it is difficult for most physics majors to compare with Lou Song.

At this time, although everyone felt that Xu You's point of view was a bit unbelievable.

But at least for now, it still makes sense in theory.

"Well, let's do some calculations now. If this -X is really a black hole, what is its radius?"

After saying that, Xu You quickly took out a pen and paper and started calculating.

Only then did everyone realize that this was another "problem" competition, and they quickly took out their paper and started calculating.

Although Xu You did not specify any specific conditions.

But in fact, everyone has ideas for this question that Xu You asked temporarily.

First of all, everyone has calculated the mass of -X before, which is equivalent to a known condition.

The main problem now is to calculate the density of the black hole.

Some people may think that the density of black holes is infinite.

But if we analyze according to the definition of a black hole, when light approaches a black hole, even light cannot escape from the black hole.

Then we can define a horizon for the black hole - that is, the interface where the escape velocity is greater than the speed of light.

Through these conditions, the calculated horizon radius is the Schwarzschild radius of the black hole.

After determining these, the problem becomes very clear.

Soon, Xu You calculated the density of the black hole and, under this assumption, the radius of -X based on these conditions.

Although Lou Song started a little slower than Xu You, with his advantage in calculation speed, he finally completed the calculation almost at the same time as Xu You.

This time Lin Shi and Luo Wenkun did not slow down too much, and they both completed the calculations not long after.

When all four people finished their calculations, they compared the final results together.

Seeing the consistent results, everyone knew that each other's calculations were correct.

"Calculated based on this assumption, the radius of -X is only about 4.5cm. It is really unimaginable for a celestial body as big as a fist."

Like Luo Wenkun, everyone has already thought that through this assumption, the calculated -X radius must be very small.

But I didn't expect it to be so small.

An object the size of a fist has ten times the mass of the Earth.

This is indeed something that breaks through ordinary people's cognition.

"We have calculated it, but how do we prove whether this theory is correct or not? We cannot say that we have completed this project just by constructing such a possible theoretical model."

Xu You seemed to have been prepared for this problem.

"As Lou Song said just now, it is theoretically possible to have a special kind of black hole like a primordial black hole. A primordial black hole was born in the early environment of the universe. Some very dense matter was squeezed by the powerful energy of the Big Bang.

, it is possible to form such a primordial black hole. Compared with ordinary black holes, primordial black holes are very stable."

"So, is it really possible that there is a black hole in the solar system?"

"Yes, such a possibility does exist. Moreover, primordial black holes may also be related to dark matter. If primordial black holes are confirmed, it can also explain many problems that cannot be explained by current theories."

Hearing what Xu You said, everyone felt even more that this theory, which had sounded a bit unbelievable before, was still possible.

"There may be black holes in the solar system? It's outrageous, it's outrageous!" Luo Wenkun complained.

Xu You's new theory not only gave everyone a new direction, but also made them realize that this subject is not just about finding -X.

Even more unsolved mysteries of astronomy will be solved.

After calming down, everyone began to think about the next questions.

"So, how do we prove that -X is a black hole?"

Originally, it was very difficult to discover a black hole.

Not to mention, it is such a black hole with a radius of only 4.5cm.

Xu You thought for a while and continued:

"It is difficult to prove, but it is not impossible. As you know, comets approaching a black hole will be absorbed by the black hole. In this process, the comet will interact with the hot gas accumulated in the area and produce some radiation signals.

, that is, an accretion flare. If we can find flares in the solar system, then there will be sufficient evidence for the hypothesis that -X is a black hole."

After hearing Xu You's analysis, Luo Wenkun couldn't help but said excitedly:

"Damn it, Xu You, how did you come up with these theories in your brain? I really want to cut open your brain and see what is the structure inside."

"It's not that exaggerated. Everyone's brains are similar. It's just that I read more books."

These days, Xu You still maintains the habit of dragging his suitcase to the library every two days, and returns with a full load every time.

After all, such a large loan quota cannot be wasted.

These days, Xu You has also read a lot of information and literature related to astronomy and physics.

This new theory is not just a moment of inspiration, but a spark of inspiration that comes from a massive accumulation of knowledge.

"Although we cannot record any data ourselves, according to the amount of data provided by Teacher Huang, it is enough. As long as we can analyze the clues of the flare from these data, then our theory will have a high level of success.

of certainty.”

"But, since this data has been analyzed by others, can we analyze anything new from it?" Lin Shi asked.

"Don't worry about this, because the amount of data recorded by the observatory is very huge. Faced with such huge data, those scientific researchers also analyze from certain dimensions, and it is impossible to completely analyze the information in the data. As long as the method is appropriate,

, it is entirely possible for us to discover some new information."

After listening to what Xu You said, everyone had a clear direction.

Immediately, under the leadership of Xu You, everyone started a new round of work.

Lou Song was good at modeling, and based on Xu You's new theory, he simulated the location and trajectory of the flare that -X might emit.

Xu You, Lin Shi and Luo Wenkun are responsible for data processing and analysis, looking for some clues in the data.

Such work may seem simple, but in actual execution, it is actually very complex and requires a lot of energy.

Although in theory, even if the volume of -X is really very small, it will not affect its absorption of comets entering the gravitational range.

But because the theoretical orbital length of -X is very large, the area that needs to be searched is also very large.

Not to mention, this -X orbit curve is only simulated, and there may be certain errors in the real situation.

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