First, there are black balls.

Zhao Mumu held up a finger.

Second, it is Louqi.

Mu Mu held up two fingers.

Third, there is the number of people.

Mu Mu held up three fingers.

Fourth, there is the crashed spaceship.

Mu Mu held up four fingers.

The atmosphere was serious, but the expressions of the people were indifferent.

In the past few dozen hours, they have gone over and over what happened at Cassini Station twenty years ago, and they have never been able to find any useful clues or clues, either they have lost key data, or they have simply thought in the wrong direction.

Zhuo Zhi and Dai Yue sat cross-legged on the floor, and they didn't expect Mu Mu to deduce anything useful.

"First of all, let's look at the problem of black balls, what is black balls?"

What is a black ball...... This is the most unsolvable of the four questions, because its existence completely violates all the laws of physics known to mankind, it is an almost pure black sphere, and from the only remaining data, people have no way to know the true identity of the black ball - is it a natural formation or a creation of a higher civilization?

Twenty years ago, the black ball was a black hole in front of all the crew members at Cassini Station, a hole in physics, a hole in mathematics, and a hole in logic.

Twenty years later, this black ball has once again become an incomprehensible and insightless existence in the eyes of people, it is the center of the puzzle, the missing link, the singularity of the black hole.

If it is a singularity, then the universe prohibits the existence of a naked singularity, and outside the singularity there must be an event horizon surrounding, and people outside the horizon can never really see the singularity.

To see the singularity, you have to go through the horizon.

And once you cross the horizon, you will never come back.

Does this mean that the truth about the black ball will never be revealed? You may be able to gain insight into Blackball's true identity, but you have to cross that line, and once you do, you'll disappear without a trace.

Lou Qi disappeared without a trace.

Mu Mu thought to himself.

"Twenty years ago, they had all sorts of messy ideas about black balls." "For example, a four-dimensional space tunnel or something......

"Is this possible?" Ge Zi asked curiously.

"Physics is not my major, I'm just a mineral." Zhuozhi scratched his head, "I can't give a very professional answer, I can only say that it is possible...... None of us have ever seen a high-dimensional object, and no one knows what it looks like, so of course the black ball may also be a projection of a high-dimensional object, and it may be placed here by a certain advanced civilization. ”

"Wow." Ge Zi exclaimed, "Why did they put this ball here?" ”

Zhuozhi thought for a moment.

"Could it be a channel for getting information? It's like a monitor, or a camera, we all know that the speed of light in the vacuum in the universe is only 300,000 kilometers per second, which is the speed limit, a person who lives one light year away from the solar system, he sees the solar system will always be the solar system a year later, then there is a one-year delay in information transmission, for some extremely clever civilizations, this delay may be as unbearable as when we play games and disconnect from the Internet, they need to know the information from all over the universe in real time......"

"Is this possible?" Mu Mu was a little stunned, "The ultimate speed of information transmission is the speed of light, and it is impossible for us to exceed this speed in this universe!" ”

"Yes, it is impossible for information in our universe to travel faster than the speed of light." Zhuo Zhi nodded, "But that black ball is a four-dimensional space, or even a higher-dimensional space, it is not our universe, so there is no need to follow our physical laws." ”

"Figuratively speaking, they folded the universe and then drilled a hole in space with a high-dimensional awl, through which they could see very far away."

Mu Mu was stunned.

"Then this super civilization actually obtains information faster than the speed of light, it takes a shortcut, is outside the light cone, but still peeks into everything inside the light cone." "This will have an even more unimaginable consequence. ”

Insight nodded.

"The law of cause and effect is broken."

·

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This was the first time that Mu Mu realized the possible problems of time.

Dai Yue and Zhuo Zhi have undoubtedly discussed the nature of the black ball for a long time, whether the black ball is a high-dimensional object, and the two have also argued many times, but the rigorous thinking habits of the two science and engineering men restrict them from thinking in the direction of too crazy.

What kind of international joke, saying that it is a high-dimensional channel is enough nonsense, okay?

What else do you want?

But Mu Mu doesn't have this kind of ideological burden, she has always been an arbitrary person.

She dared to think of anything.

What is the law of cause and effect?

I planted a seed, and after two months, it sprouted – it's called the law of cause and effect, planting the seed is the cause, and germinating is the effect.

This universe stipulates that it cannot be reversed, it cannot germinate first and then plant seeds.

"What are you talking about?" Ge Zi was at a loss.

"To explain simply, we all know that time and space are not absolute." "The absolute view of space-time has been eaten by the great Albert Einstein, and in the special phase, that is, in the special theory of relativity, time and space are related to velocity, and for the same thing, we see different things in different frames of reference...... Here's an example. ”

The more Ge Zi listened, the more confused he became, and Zhuozhi decided to give an example.

"On a high-speed ultra-long subway, for example, one-third of the speed of light, 10,000 kilometers long, Xiao Zi, you stand in the middle of the subway car, holding two laser cannons in your hand, one side of the Eula Ola Ola, while pulling the trigger at the same time, one shoots at the front of the car, and the other shoots at the rear of the car." Zhizhi took out a pen and slid on the floor to act as a subway, "and Dai Yue was standing on the platform waiting for the train at this time......"

Dai Yue rolled his eyes.

"For you...... Xiaozi, you stay in the carriage, so the subway and you are relatively stationary, right? ”

Ge Zi thought for a moment and nodded.

"So what you're seeing should be that the laser cannon pierces the front and rear of the car at the same time, and the front and rear of the car explode at the same time." Zhuo Zhi said.

Ge Zi nodded.

"But for Dai Yue, who was standing on the platform waiting for the train, this was not the case." Zhuo Zhi continued, "In his eyes, the subway is moving forward, the laser of the laser cannon is in the middle of the flight, the rear of the car is moving closer to the laser cannon, and the front of the car is moving away from the laser cannon, so the rear of the car explodes first, and the front of the car explodes later." ”

Ge Zi frowned.

"This is the principle of relativity, for the same thing, your frame of reference is different, and you see it differently." "But—"

Insight paused.

"This doesn't challenge the law of cause and effect, no matter what frame of reference you're in, to see this subway, it's all about shooting first and then exploding, it's impossible to explode first and then shoot."

"The law of cause and effect is ironclad." Dai Yue added, "Welded to death." ”

"And the law of cause and effect dictates that it is impossible to exceed the speed of light in our universe, so in our universe, it is impossible to exceed the speed of light under any circumstances." Insight went on to say, "If there is a superluminal speed, then the law of cause and effect will be shaken. ”

"What does that mean?" Ge Zi asked, "What does it mean that the law of cause and effect is shaken?" ”

"It means that in the example of the last subway, Daiyue may see the front and rear of the subway explode first." Wisdom said, "You shoot again." ”

"It also means ......," Mu Mu whispered, "in some frames of reference, they observe us, it happened in advance twenty years ago, and we are latecomers, but in other frames of reference, those higher civilizations observe us, we come to Cassini Station first, and twenty years ago happens afterwards." ”1603466775