China's first Mars exploration to achieve three go

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China's first exploration of Mars has achieved three goals in one fell swoop

"the development of the Mars exploration project planned to be implemented around 2020 is progressing smoothly, and the expected scientific goals are being studied in advance. China's first Mars exploration project probe carries a total of 13 effective loads, including 7 orbiters and 6 rovers, involving space environment exploration, Mars surface exploration, Mars surface structure exploration and other fields." On the 20th, the third Beijing International Forum on lunar and deep space exploration opened in Beijing. Zhang Rongqiao, chief designer of China's first Mars exploration mission, said at a briefing before the opening ceremony that he would vigorously promote the development of the new material industry

Mars is a planet close to the earth in the solar system, and its natural environment is the most similar to that of the earth. It is the preferred target for human beings to carry out interplanetary exploration

"at present, human deep space exploration activities have entered a new period of unprecedented activity, and the construction of lunar stations and Mars have become the two main directions of rapid development." At the opening ceremony, Yu Guobin, deputy director of the China Lunar and space exploration engineering center, said

the United States has formulated a grand strategic plan covering major celestial bodies in the solar system and taking the realization of manned Mars exploration in the 1930s as the long-term goal. ESA is jointly implementing the "ExoMars" program with Russia and participating in the development plan of the service module of the American "Orion" spacecraft

"for the exploration of Mars, the international community has achieved the skimming, circling, landing and patrol exploration of Mars. Mars has become the exploration hotspot and strategic commanding point of space technology of major space countries, and has become the preferred target of planetary exploration. Mars exploration will have a situation of high-tech development in technology and new discoveries in science." Yu Guobin said

however, constrained by the laws of celestial bodies, there is only a favorable launch opportunity for Mars exploration every 26 months. From now to around 2021, there are only three launch opportunities. There will be four Mars exploration missions in the world, ushering in the peak of Mars exploration

opportunities are rare. "China's first Mars exploration mission achieved the three goals of 'orbit, landing and inspection' at the same time, which is unprecedented for other countries and unprecedented challenges." Zhang Rongqiao emphasized

it is understood that China's first Mars exploration mission is not only to achieve global remote sensing exploration around Mars, but also to break through key technologies such as Mars entry, descent, landing, patrol, long-distance measurement and control communication, so that we can truly enter deep space, approach Mars, and uncover its mystery

"Mars is about 400million kilometers away from the earth, and the probe needs about 7 to 10 months of cruise flight to be captured by Mars after the separation of the spacecraft and the arrow. After the orbiter flies around Mars, it needs to be separated from the landing inspector, and then adjust the range to the required size according to the actual rough measurement results, and then enter the mission orbit to open and close the test host exhibition to explore the global orbit of Mars, and carry out relay communication for the landing inspector at the same time, which is important in orbit design We need to take into account the needs of surrounding and landing. " Zhang Rongqiao explained

at the same time, after the separation of the landing inspector and the orbiter, it enters the Martian atmosphere. After aerodynamic shape deceleration, parachute deceleration and reverse thrust engine power deceleration, it finally descends and lands on the Martian surface. The rover drives away from the landing platform and starts the inspection and exploration of the Martian surface. It is necessary to detect the morphology, soil, environment and atmosphere of the Mars, and study the distribution of water ice, physical field and internal structure on Mars

"due to the large time delay of long-distance data transmission, the Mars rover must have a high degree of autonomy. The light intensity on Mars is small. Coupled with the reduction of sunlight by the Martian atmosphere, the energy supply of the Mars rover is also more difficult than that of the lunar rover, which makes the first Mars exploration mission more complex. Although there are many difficulties, we still have confidence in winning." Zhang Rongqiao said

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