According to the latest information of tianwen-1 released by the National Space Administration, tianwen-1 is more than 100 million kilometers away from the earth. As of 21:00 on December 14, the “tianwen-1” probe has been in orbit for 144 days, with a flight mileage of about 360 million kilometers, more than 100 million kilometers away from the earth and about 12 million kilometers away from Mars. It is in good flight condition.

Influenced by the laws of celestial motion, the distance between Mars and the earth varies periodically from 50 million km to more than 400 million km“ When tianwen-1 arrived near Mars, it was about 190 million kilometers away from the earth.

Since its launch on July 23, tianwen-1 has successfully completed the Earth Moon group photo, detector “self photo”, three midway corrections, one deep space maneuver, and payload self-test. In the future, several orbit modifications will be carried out. It is expected that after approaching Mars in the middle of February next year, the “brake” will be applied to enter the annular fire orbit to prepare for Mars landing.

100 million kilometers is equivalent to the length of 2499 earth equators. Now, tianwen-1 is flying to Mars at a speed of 17.4 kilometers per second, and is expected to visit our earth’s “Sister star” in less than two months.

China’s first Mars exploration mission named tianwen-1

Tianwen-1 (code name tianwen1) is China’s first Mars probe developed by China Academy of space technology, affiliated to China Aerospace Science and Technology Corporation. It was launched from the Long March 5 yao-4 carrier rocket at China Wenchang space launch site on July 23, 2020 and successfully entered the predetermined orbit.

Tianwen-1 was successfully launched. It is planned to arrive at Mars in about seven months’ flight, and land on the surface of Mars after two to three months’ circling flight to carry out exploration mission.

It will carry out scientific exploration of Mars’ surface morphology, soil characteristics, material composition, water ice, atmosphere, ionosphere, magnetic field, etc., so as to realize China’s technological leap in the field of deep space exploration.

In April, the National Space Administration officially announced that China’s planetary exploration mission will be named “Tianwen”, China’s first Mars exploration mission will be named “tianwen-1”, and China’s first Mars exploration logo “Lanxing Jiutian” will be released. In addition, the global search for the name of China’s Mars rover will be launched soon.

In addition, China is developing the first Mars exploration project. According to the plan, China will launch a Mars probe through long March 5 in 2020, and realize Mars orbit, landing and patrol exploration through one launch. After about seven months of flight, the Mars probe will arrive on Mars.

According to the introduction of experts related to China’s first Mars exploration mission, the implementation steps of China’s Mars exploration mission are as follows: launch the Mars probe to the earth fire transfer orbit with the Long March 5 rocket, then with the support of the ground measurement and control system, through multiple orbital maneuvers and midway correction, implement braking at the near fire point, enter the annular fire elliptical orbit, and run to the selected entry window, The probe will control the descent and release the landing Rover. After entering the Martian atmosphere, the lander makes a soft landing through aerodynamic configuration, parachute, engine, multi-stage deceleration and landing recoil. After the separation of the rover and landing platform, the regional patrol detection and some related engineering practice activities will be carried out. The orbiter will provide relay communication link for the rover and carry out scientific detection around it.

It is worth mentioning that today, 50 years ago, the long March-1 carrier rocket successfully launched the dongfanghong-1 satellite, officially ushering in China’s space age. Fifty years later, although dongfanghong-1 had already stopped working, it was still flying around the earth“ Dongfanghong-1 satellite, the first man-made earth satellite launched by China, was successfully launched at Jiuquan Satellite Launch Center on April 24, 1970, which ushered in a new era in China’s space history and made China the fifth country in the world to independently develop and launch man-made earth satellites after the Soviet Union, the United States, France and Japan.


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