Photo source: animation simulation screenshot
The nine minutes of the landing of tianwen-1. On May 15, China’s first Mars exploration mission, tianwen-1, landed in the preselected landing area in the south of the Martian Utopian plain, leaving a Chinese imprint on Mars for the first time, making a great contribution to China’s interstellar exploration.
This has also made China the third country after the Soviet Union and the United States to actually “set foot on” (successfully land) Mars, and the first country to land on Mars exploration.
On July 23, 2020, China’s first Mars probe, tianwen-1, was launched in Wenchang, Hainan Province. On February 10 this year, after more than half a year’s flight, the “tianwen-1” spacecraft completed its “braking” deceleration and began its journey around Mars. More than half a year after its departure, it has been 170 million kilometers away from the earth, and its total flight mileage has exceeded 450 million kilometers.
After waiting around Mars for more than three months, we finally found the right time. At about 1:00 a.m. on May 15, tianwen-1 probe lowered its orbit in its moored orbit and moved to Mars to enter orbit. At about 4:00, the landing Rover and the orbiter separated. After about 3 hours of flight, it entered the Martian atmosphere. After about 9 minutes of deceleration, hovering, obstacle avoidance and buffering, it successfully landed in the pre selected landing area in the south of the Martian Utopian plain.
From entering the Martian atmosphere to landing on the Martian surface is the most dangerous moment in the whole process of Mars landing. The Mars landing of China’s tianwen-1 mission is divided into four stages: aerodynamic deceleration, parachute system deceleration, dynamic deceleration, hovering obstacle avoidance and slow descent, which last “nine minutes”.
About 30 minutes after the separation of the two orbiters, the orbiter ascended and returned to the docking orbit, providing relay communication for the follow-up exploration mission of the lander and building a communication bridge between the earth and Mars. In the future, the “zhurong” Mars rover will successively take global imaging, self inspection, leave the landing platform and carry out inspection and exploration.
According to Zhang Rongqiao, chief designer of China’s first Mars exploration mission, the configuration details of the “zhurong” Mars rover were announced: the rover weighs about 240 kg, is driven by six wheels independently, carries six payloads, and its solar wings are butterfly shaped. Therefore, some people figuratively compare the “zhurong” Rover to “Mars butterfly”.
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