What kind of scientific and technological value does the success of landing on Mars mean?

What is the significance of Tian Wen-1' s successful landing on Mars?

Putnik news agency and radio station

In an interview with Sputnik news agency & radio, China experts said that China's first Mars exploration mission, the landing of Tian Wen-1 probe on Mars, was a great test of the comprehensive ability of China's fire detection technology. Its success has proved China's excellent scientific and technological strength, and laid an important foundation for the next step to realize Mars sampling return.

According to China National Space Administration, at 7: 00 on May 15, the scientific research team confirmed that Tian Wen-1 landing patrol successfully landed in the pre-selected landing area in the southern part of Mars Utopia Plain according to the telemetry signal sent back by the "Zhu Rong" rover.

China's first Mars exploration mission successfully landed on Mars.

Subsequently, the "Zhu Rong" rover will carry out global imaging of the landing site, self-inspection, leaving the landing platform and patrol detection in turn.

What are the technical difficulties in the successful landing of Tian Wen-1?

According to the introduction of China National Space Administration, Tianwen-1 probe consists of an orbiter and a landing patrol, including the "Zhu Rong" rover and its entry module. On February 24th, 20021year, Tianwen-1 successfully carried out the third near fire braking, carried out global remote sensing exploration of Mars, conducted detailed investigation on the pre-selected landing area, and detected and analyzed the topography, sand and dust weather, so as to prepare for landing on Mars.

In an interview with Sputnik news agency & radio, Jiao Weixin, a professor at the School of Earth and Space Sciences in Peking University, stressed that China has mastered the relevant technology of any single link, but because of its insufficient understanding of the Martian atmosphere, it has an important impact on the next link, which is a great test for China's comprehensive ability of fire detection technology.

He said: "First of all, the situation facing Mars exploration is that although there is an atmosphere, the atmosphere is extremely thin. The atmospheric pressure of Mars is less than 1% of that of the Earth. So we can't directly apply the experience of landing on the moon, nor can we use the experience of returning to Earth from space. But to formulate technical measures according to the actual situation of Mars, but this is precisely China's shortcoming. Because China first explored Mars, he didn't know much about the atmosphere of Mars, and he could only get some data from some friendly countries in Europe.

Secondly, the success of each landing stage and how to design it are all related to the state of the atmosphere. For example, after entering the atmosphere, the deceleration phase is completely slowed down due to friction with the atmosphere, and the return capsule will be very hot due to friction. Therefore, how to design the return capsule, at what height to enter the atmosphere and at what height to open the parachute are all related to the density of the atmosphere, the structure of the atmosphere, the wind field and so on. And how big the parachute needs, how long it will run and how to open it at supersonic speed in a thin atmosphere. One link is linked with another, which influences each other. If anything goes wrong at any step, the task will not be completed. "

The significance of the complete success of China's first Mars exploration mission.

China Space Agency said that one person was asked that day.