when she returned

The spacecraft returning to Earth was a complicated and challenging process. Before the spacecraft returned, it would continue to communicate with the ground control center. Due to the Earth's rotation and the spacecraft's orbit, the spacecraft would decelerate after reaching a predetermined position and enter the atmosphere at a special angle. It was crucial to grasp this angle. If the angle was too small, the spacecraft would fall rapidly and turn into a fireball due to friction with the atmosphere. The astronauts would suffer from extreme gravity and threaten their lives. If the angle was too large, the spacecraft would be ejected. This principle was based on Bernouli's theorem. It was like throwing a stone into water. If the angle was too small, it would sink to the bottom. If the angle was too large, it would pop out of the atmosphere due to the upward velocity caused by the pressure difference. However, the ground command center had already calculated the relevant data before the spacecraft entered the atmosphere. When the spaceship returned to the atmosphere, it was extremely fast, reaching hundreds of times the speed of sound. A strong shock wave formed at the front of the spaceship. Due to the compression of shock waves and the viscous effect of the atmosphere, a large amount of kinetic energy was converted into heat energy. The increase in the surface temperature of the spacecraft caused the gas and heat-resistant materials to produce an "ionisation", forming high-temperature ions around it, causing the transmission of electromagnetic waves used for communication to be weakened or reflected. The spacecraft lost contact with the ground command center. This phenomenon was called a "black barrier", but it would disappear after leaving the atmosphere. Atmospheric friction had a significant effect on the spacecraft's deceleration. It could reduce the spacecraft's speed from 30,000 kilometers per hour to several times the speed of sound. After leaving the atmosphere, the spacecraft would open the parachute. The parachute would balance and decelerate the spacecraft, making the spacecraft parallel to the ground to prevent it from crashing due to imbalance. After the spacecraft descended to a certain height, the heat shield would separate and the landing equipment would be installed inside. Different spaceships had different landing methods. The most common ones were jet landing and air bag landing. Jet landing was to open the parachute of the spacecraft and start the jet engine about ten meters above the ground to generate a huge thrust to reduce the speed. The seats inside the spacecraft had shock absorption and could withstand the reaction force. Airbag landing was more economical and could be reused. When the airship landed, the spacecraft had to first reduce its speed to a certain level, but there might be a rebound situation, which could be avoided by modifying the parachute (such as using multiple parachutes or reducing the cushion of the airship). It was better for the new manned spacecraft to use a group parachute + airship landing method. In the future, when exploring planets with little atmospheric mass (such as Mars), jet landing might become the preferred option because the deceleration effect of parachutes would be greatly reduced. For example, when the Shenzhou-13 spacecraft returned, it first separated from the space station, carried out attitude adjustment, separated the orbital module, and other operations. It used the rapid return technology to circle the Earth five times before finding the return opportunity. The engine ignited and braked to reduce the speed to leave the orbit. Then, after a series of attitude adjustment, separation of the propulsion module, and other operations, it descended. Due to the high speed, it produced a heating effect. The surface was specially made with a honeycomb-shaped heat-resistant material to ensure that the temperature in the astronauts 'cabin was suitable. The parachute opened at a suitable height to assist in deceleration. Finally, when it was 1.2 meters from the ground, it started the reverse rocket to reduce the speed to zero and land safely. The novel "Hundred Years of Spaceship" is equally exciting. Everyone is welcome to click and read it!

Lu Feng was reborn in 1988. He used modern thinking to make a name for himself here. He wanted to get back what he had missed and lost. He became the godfather of business, guiding the country and making everyone revere him. His family also became the object of envy.

We can tell that he has returned to 1983. The specific plot and background required further reading of the relevant literature to obtain more information.

Zhou Yufeng returned to 1983, an era of planned economy and crossing the river by feeling the stones. Facing his wife who wanted a divorce and his younger brother and sister who were living a difficult life, he showed his talent and wisdom in the business world. He had changed the future situation by turning the clouds and rain with a flip of his hand. The story was adapted into a novel and manga, and a physical book was published on Jingdong Mall.

In 2018, Xu Lingyue starred in the TV series " Return " and played Miao Ying, the " second generation of the Shang family." Xu Lingyue won the annual Newcomer Award for her performance in the drama. " Return and Return " told the story of Xiao Qing, Shu Che, Miao Ying, Ning Ming, Cheng Ran, Green Card, and others who had gathered in the United States for various reasons such as family, ideals, love, and so on. After they became the elites of rattan schools, they gradually transformed from ivory towers into society. While waiting for the TV series, you can also click on the link below to read the classic original work of "Dafeng Nightwatchman"!