With the passage of time, the earth, the planet that carries all the hopes of human civilization, has finally turned into an ordinary star. At least in Zhao Lan's opinion. Except that the Earth is a little brighter than the other planets in the galaxy, it has no other features.

Zhao Lan's Sylvia spacecraft has been sailing in the vast universe for three days. During these three days, Li Yunfan sent Zhao Lan a batch of observational information about the empty universe he was in. Because the spaceship that Li Yunfan was on was not a professional scientific research spaceship, the information sent was incomplete and inaccurate, but even so, those materials were enough to make Zhao Lan feel heavy in his heart.

That universe...... It's really scary. A stagnant water, an empty space. Zhao Lan even doubted whether there was a concept of "time" in that universe. Time is a physical quantity that describes the motion of matter, and without matter, there is no time, or time has no meaning. For that universe, it doesn't make any difference between 10,000 years or 100 million years. In this case, the spaceship that Li Yunfan was on could maintain the normal passage of time, which was the most incredible thing for Zhao Lan.

And it doesn't seem to be bothered by an increase in entropy or a loss of energy. An empty, completely empty universe has a fixed entropy value, while a spaceship with matter arranged in a certain pattern has no lower entropy value. According to the laws of cosmology, the matter of the spaceship tends to diverge, and eventually it is completely uniform throughout the universe. Although this time would be long according to existing cosmological theories, it is not a normal universe, and who knows what strange laws of physics will be used in that universe.

There everything is unknown, and at the same time, everything is dangerous. Li Yunfan's life can be said to be in danger at any time. But even so, Li Yunfan has always maintained a normal psychology and emotions, and has not been affected by the environment at all, which is what Zhao Lan admires the most.

The more he knew about Li Yunfan, the more Zhao Lan admired Li Yunfan. Sometimes Zhao Lan even has such thoughts: "If this star disaster is real, if human civilization really faces the threat of life and death...... Maybe human civilization really has to rely on Li Yunfan to survive this crisis. Li Yunfan may really be able to turn the tide like my ancestor Zhao Huasheng. After all, this man is so powerful, I don't know who else can compare with him in human civilization. ”

During these three days of sailing, Zhao Lan was already nearly 30 million kilometers away from the earth, and less than a million kilometers away from the point in Lobachevsky's space in the calculation. After finally confirming some things with Li Yunfan. Zhao Lan set the spacecraft to automatic sailing mode, then left the pilot's seat and went to the control cabin, ready to operate the most sophisticated observation instruments to start making measurements.

The optical instrument preferably projects a circle on a flat screen prepared in advance in a vacuum environment. The circumference data of this circle was stored in the instrument, and Zhao Lan manipulated the observation instrument to begin to measure the diameter of the circle. After obtaining the diameter data, Zhao Lan divided the perimeter and diameter to get a series of data.

"Three, one, four, one, five, nine, two, six, five, seven......" Zhao Lan silently read the string of numbers. This string of numbers Zhao Lan is very familiar with, in fact, as early as more than ten years ago, Zhao Lan had memorized all the numbers from this string of numbers to a thousand decimal places. Zhao Lan compared this series of numbers with the exact number of pi obtained through mathematical calculations, and came to the conclusion: "The accuracy of the instrument's measurement of pi is as high as 300,000 decimal places." ”

Because this string of numbers is exactly the same as the first 300,000 digits of standard pi, there is a slight difference after 300,000 digits. This shows that the measurement data of this instrument is in the. At least the first 300,000 bits are correct.

Zhao Lan changed the size of the circle projected by the optical instrument again, and then repeatedly measured it several times, and finally confirmed this. After determining the accuracy, Zhao Lan stopped operating, but began to wait.

The ship was still moving silently. Because the ship was constantly slowing down, it took the ship a full eight hours to cover the million kilometers distance. Then the ship came to a standstill with the sun.

The universe here is no different from the universe in other places, it is all the same emptiness, the same darkness. Zhao Lan's eyes could still see the stars in the sky through the porthole, and he could see the bright sun in the distance, and the slightly blue planet next to the sun. The ship is working as usual here. The navigator and gyroscope are also working normally, without any abnormalities.

But Zhao Lan knew that this place was unusual. Because the mathematical model calculations show that this must be different from the others. If this is a normal space, then it means that the math has gone wrong. And Zhao Lan thinks that such a thing cannot happen.

Zhao Lan took a deep breath and manipulated the optical instrument to reflect a circle again in the vacuum environment. It was then measured again with a measuring instrument. The two numbers were quickly drawn and entered into the calculation program to start the calculation, and soon the number extended to hundreds of thousands of digits, and it is still rapidly extending.

The measurement accuracy of this instrument is 300,000 bits, so too many digits are completely unnecessary. Zhao Lan stopped the calculation process. The pi data obtained this time is then entered into the comparison program by the program. The program only runs for a split second, and then the result is displayed.

Zhao Lan narrowed her eyes slightly and looked at the result of the calculation. The result of the calculation is just as Zhao Lan expected, the pi data measured in this Lobachevsky space...... It is exactly the same as the previous measurement of pi in Euclidean space, which is exactly the same as the previous 237,684 digits, but it is deviated from the 237,685 digits.

The number measured in the standard space is four, while the number measured here is six.

And Zhao Lan already knows that the measurement accuracy of this instrument is 300,000 bits. That is, the first 300,000 digits of these two different strings of numbers are correct, but they are not the same as each other, which only proves the ...... It's the space that makes the difference. Here there is some distortion or unevenness of space, and it is this change in space that causes the change in pi.

The results of one measurement may be a little inaccurate, so Zhao Lan repeated dozens of measurements. But the result was exactly the same every time I measured it, and the number above that digit was six every time.

Zhao Lan let out a sigh of relief, then stopped the measurement, and stored all the calculation data in the computer. Things have developed so far, everything Li Yunfan said has been confirmed, and ...... The real situation is even worse than what Li Yunfan said.

Because Zhao Lan sensed that the increase in spatial curvature seemed to be accelerating. The greater the curvature of space, the faster the stars disappear, and the faster the Earth will fall into that empty universe. This is obviously not a good thing for human civilization.

Zhao Lan felt a slight sense of urgency in his heart.

"I've already done the measurements." Zhao Lan whispered, "Your words have been confirmed. The space around the Earth, or in the solar system, does change, and the Earth ...... It is indeed falling into that empty universe. ”

This is a very bad result. Before this measurement appeared, Zhao Lan even prayed in his heart that none of this would happen. Zhao Lan would rather that these experiences were only deceived by Li Yunfan and his organization, rather than that all of this was true. Because the deception is against oneself alone, and if the scourge of the stars is true...... It is facing all of humanity.

By now, all the hopes in Zhao Lan's heart have finally been completely shattered. The cruelest truth has been presented in front of Zhao Lan.

Li Yunfan's reply arrived after the communication delay, and his voice was still lazy: "Now you finally believe me?" ”

Zhao Lan didn't answer this question directly, but asked a little helplessly, "What should I do?" What should we do as human civilization? The current level of science and technology of our human civilization is not enough to exert influence on space...... Can we find a way to stop the Earth from falling into the empty universe? ”

Facing Zhao Lan's slightly frightened question, the laziness in Li Yunfan's words finally disappeared, and was replaced by a firmness like steel: "Zhao Lan, you have to believe that the potential of our human civilization is unlimited. As long as there is a disaster, there will be a hero who can turn the tide and change everything. In the solar crisis, your ancestor Zhao Huasheng is such a hero, and in this crisis, there will definitely be heroes who can compare to Zhao Huasheng. ”

The strong confidence and firmness in Li Yunfan's words finally calmed Zhao Lan's emotions. Zhao Lan whispered: "I'm sorry, I, I lost my temper." Indeed, we still have time, and now is far from the time to despair. I'm going to return to the 105 Institute now, and I'm going to announce these things to scientists in all of humanity. I believe that with the efforts of all mankind, we will definitely find a solution to the problem. ”

"Don't forget to share your findings with me." Li Yunfan said, "I don't have the ability to conduct scientific research now, but I think that as long as there is data and data support, my brain can still make a little contribution to mankind." ”

Zhao Lan replied in a low voice, "Yes." (To be continued.) )

PS: The second shift is here, and the third shift is coming soon!