Soon, after shaking violently a few times, Tianzhi-1 adjusted the gravitational parameters, and then entered a flat state.

In the video screen, there is no large jitter, and the picture begins to appear in a faint curvature of the earth.

"The picture has become a lot clearer." Sun Zhongyong said.

Chen Mengchuan nodded: "In the stratosphere of the earth's atmosphere, there are relatively few water vapor, suspended solid particles, impurities, etc., the weather is relatively clear, the light is also very good, and the visibility is very high. ”

"Now the speed has reached 200 kilometers per hour, and if you continue to fly for a few minutes, you will start to enter the middle layer, and then the speed should start to increase significantly, and the temperature will decrease again." Toni said calmly.

"This atmosphere is a bit interesting, the temperature is high for a while and low for a while, I used to learn less geography, but now I feel a little regretful." Sun Zhongyong said with a smile.

Several people also laughed, and then Chen Mengchuan gave him a brief science popularization.

"The mesosphere is a special layer in the atmosphere, with the stratosphere below and the thermosphere above. The temperature of the mesosphere decreases with altitude, so its atmosphere has a fairly strong vertical movement, and because it is located between the highest altitude that an airplane can fly and the lowest altitude of a spaceship, it can only be accessed by suborbital rockets, because of this, the mesosphere is the least known layer of the atmosphere. ”

"And the mesosphere also fluctuates in temperature with the seasons, but this fluctuation is the opposite, that is, the temperature is much cooler in summer than in winter. In winter, the gravitational wave of the atmosphere breaks up in this layer and transports westward momentum as if it were exerting a westward drag. ”

"And in order to balance this drag force, the atmosphere must move in the polar meridional direction to obtain the east-facing Coriolis force."

"This meridional movement from the summer pole to the winter pole caused the atmosphere of the summer pole to rise, and the adiabatic expansion and cooling; In winter, the polar atmosphere sinks, and adiabatic compression heats up. ”

"The effect of this circulation on temperature exceeds the radiative heating of the sun, so the temperature at the mesopause is instead the coldest in the summer polar region with direct sunlight, and the hottest in the winter polar region without sunlight."

"So, the temperature in the mesosphere in the summer will be below ?100°C, which will be much lower than the mesosphere in the winter."

"In addition, the mesosphere is very rich in gaseous particles, and millions of meteors enter the Earth every day and are burned up in this mesosphere of the atmosphere. When meteoroids enter the mesosphere, they collide with gaseous particles in the mesosphere, which causes a high concentration of iron or other metal atoms. This collision quickly creates enough friction to cause burning, and then the heat causes the falling objects to burn up before they reach the surface. ”

After Chen Mengchuan's popularization of science to Sun Zhongyong, Tianzhi 1 also officially entered the middle layer and began to accelerate faster, reaching a speed of 400 kilometers per hour and still accelerating.

In just a few minutes, the artificial intelligence Ayu in the Tianzhi No. 1 warehouse reminded: "Lao Xu and Lao Zhang, you are about to enter the thermosphere, the temperature will increase, the warehouse will start to start the refrigeration system, and the entire flight will last 700 kilometers until you enter the final escape layer." ”

"Okay, Ayu, thank you for the reminder." Xu Zhenglin opened his mouth and said, during this period of getting along, artificial intelligence Ayu has become another bosom friend between him and his daughter-in-law, and the couple basically no longer regard Ayu as an artificial intelligence, but as a real living person, a real human who seems to be communicating and guiding them with voice on the other end.

"Here's what I'm supposed to do." Ayu replied with a smile.

Soon, Tianzhi-1 turned off the external camera, and at the same time retracted the gravitational outer node to assist the flight, and the entire spacecraft flew towards the boundless cosmic abyss like a huge bullet.

All the live video pictures are still being introduced and explained, although the number of viewers has decreased, but there are still a large number of people watching the live broadcast, constantly cheering for the two people on Tianzhi 1.

A few minutes later, a screen in the cabin slowly lit up in front of the two of them.

"Lao Xu, Lao Zhang, you are going to be popular this time, more than 2 billion people around the world have seen you two, and people are constantly cheering you on. I'm going to show you some translated footage. Ayu said and put a lot of screenshots of comments on the screen, and the slideshow was played quickly.

Xu Zhenglin and Zhang Ying were originally unwavering, but they didn't expect to see the screenshots of these comments, and they couldn't help but burst into tears, although the two of them were about to fly out of this planet, they were not alone, and there were still so many people on the earth supporting them.

"Ayu, can you help me convey some words to Earth?" Xu Zhenglin asked.

"Of course, you can say it, and I will transmit the video and voice to the earth."

"Family and friends on Earth, I am Xu Zhenglin, and I am on my way to the moon now, we are very lucky that we can have this opportunity to become a member of the team to go to the moon, we have seen many of you on social media and video media comments and comments, thank you for your support."

"Big guy, I'm Zhang Ying, thank you for ......"

The two of them said in a surging mood, and the voice was transmitted to the people on the earth through the artificial intelligence Ayu, and under the translation of a group of self-media people, it was quickly transmitted to the world......

The flight of Tianzhi-1 continued, and the speed became faster and faster, soon exceeding 500 kilometers per hour, and it continued to increase speed.

After more than one hour, it finally flew to the top of the thermosphere, and then broke through the thermosphere for more than 700 kilometers.

"Lao Xu, Lao Zhang, congratulations, you have entered the dissipation layer, the flight speed of Tianzhi 1 will soon begin to increase significantly, if there is discomfort in this process, please tell me as soon as possible." Ayu said carefully.

"Let's start speeding up, Ayu." Xu Zhenglin said.

After his words fell, Tianzhi 1 quickly began to speed up rapidly, and the speed exceeded 1000 km/h very fast!

And as it gets farther and farther away from the center of the earth, the gravitational pull of the earth begins to get smaller and smaller, and the speed of the spacecraft soon accelerates to 1500KM/h in a few minutes!

IT THEN STOPPED AT 1500KM/H.

"Lao Xu, Lao Zhang, Tianzhi 1 has been stabilized and can unbuckle and move freely, we will arrive at the moon in 261 hours and start to fly in a lunar orbit!"

Ayu's words were not only said to Xu Zhenglin and Zhang Ying, but also to the command department on Earth.

After her words fell, everyone cheered and hugged excitedly!

"There is no doubt that we succeeded!" Chen Mengchuan looked at the picture on the screen, as if he had seen the future!

After unbuttoning the buckle, Zhang Ying walked to the slowly opened observation window, looked at the huge blue planet, and a shiver made her tremble, and she couldn't help but touch the window with tears streaming down her face.

"Hello, Earth......"

(End of Volume 3!) ）