2021-10-18

Solar exploration may usher in a new human plan

By yqqlm yqqlm

“Xihe” exploring the sun! 140 second animation to see China’s solar exploration and ice breaking journey

140 second animation to see China’s solar exploration and ice breaking journey

Science and Technology Daily reporter Zhang Jiaxing

if you want to detect the sun in an all-round way, you also need to deploy a three-dimensional detection system. “In terms of space exploration of the sun, China has not yet established a systematic project.” Yang Mengfei said, but it is precisely because it started late that we should have the courage to meet the challenges and seize the opportunities brought by the late development advantage

Solar exploration may usher in a new human plan

at 18:51 on October 14, China successfully launched the first solar exploration science and technology test satellite “Xihe” by using the long march-2 D carrier rocket at the Taiyuan Satellite Launch Center, realizing the breakthrough of zero solar exploration in China. The figure is the schematic diagram of “Xihe” exploring the sun. Figure source: the eighth Academy of Aerospace Science and Technology Group

omni-directional three-dimensional detection of the sun, unprecedented

human beings have launched space probes to detect the sun for more than 60 years. With the development of aerospace technology and payload, solar exploration in various countries has been upgraded from solar terrestrial connection to solar proximity or dual viewing angles. Popular understanding is like gradually achieving the goals of “shooting” close range for the sun and “shooting” with double lenses

however, there is no way to carry out omni-directional stereo detection of the sun

what is stereoscopic? According to the three-dimensional detection system scheme, China will deploy detectors at five points of the ecliptic and polar orbit to realize “encircling” observation of the sun. Especially the polar detector, it takes five years to fly in place. What concept? Is to run more than 180 back and forth between the earth and the moon. This brings great challenges to spacecraft control and data transmission

since it is so difficult, why do we have to carry out stereo detection? Yang Mengfei told Science and Technology Daily that in order to lead mankind to refresh its new understanding of the sun, make major original innovative achievements and have influence in the world, it is necessary to have a new way of detection. China has its own institutional and institutional advantages and can concentrate on doing great things

China already has the technical strength of ultra long distance flight

ultra long distance flight in deep space is the peak of Aerospace Science and technology strength: we should not only conquer ultra long distance, complex temperature changing environment and solar storm… But also calmly deal with the crisis at any time in the long journey of hundreds of millions of kilometers

it is a new goal once again set by Chinese astronauts with strength and confidence guided by the aerospace spirit to climb, surpass, seize the commanding heights of science and technology and conduct three-dimensional detection of the sun

according to the assumption, China will build an omni-directional three-dimensional detection system around the ecliptic (the orbital plane of the earth orbiting the sun) and the solar polar region through two launch missions (one arrow and three stars and one arrow and two stars respectively) around 2035, so as to realize the three-dimensional detection of the global sun and solar terrestrial space. Before putting forward the idea, the team fully demonstrated the existing technical strength, implementation path and specific scheme

taking one arrow and three stars as an example, by analyzing and comparing the differences between direct orbit and celestial force, a scheme to change the orbital direction and orbital energy with the help of celestial gravity has been determined. The flight will be divided into three stages. The launch vehicle will complete the first stage of the journey, and the last two stages of the journey will be completed by force flight and deep space maneuver

“through the lunar exploration project and the implementation of tianwen-1, we have a good technical foundation.” Yang Mengfei said that Chinese researchers have mastered a new method to let aircraft fly by force

it is reported that five aircraft need to fly for 2-5 years to reach the designated position. The new technology has achieved a major breakthrough and greatly reduced the flight time of the previous scheme

Yang Mengfei revealed that the mass of each group of detectors for stereo detection is about 3500 kg, and the effective load is about 400 ~ 600 kg. Using space technologies such as multi celestial body borrowing technology, high-efficiency propulsion module and electric propulsion technology, China has the ability to realize the super long flight and accurate orbit entry of the probe. It is expected that three years after the launch, the solar stereo detection system will have full coverage and continuous observation capability in the middle and low latitudes of the sun, and five years after the launch, it will have all-round stereo detection capability of the sun

from the earliest pioneer to the solar orbiter which is closer to the sun than mercury, many solar exploration missions have been carried out internationally. China has carried out advance research on the solar space telescope and the Kuafu program of “chasing the sun”. Its detector is designed to orbit millions of kilometers away from the earth

new changes have taken place in the current situation. International missions have reached a new depth and brought new cognition. For example, the Parker solar probe is the man-made object closest to the sun in history, and has realized the proximity detection at about 9.5 solar radii from the heliocentric for the first time

experts attending the meeting believed that it is imperative to carry out stereo detection in China

on the one hand, it will provide high-quality data for solar physics research and space weather prediction. According to Wang Jingxiu, an academician of the Chinese Academy of Sciences who has studied the sun for more than 40 years, there are still a series of major cutting-edge scientific problems in solar physics

there is no second place in the original innovation of scientific research. “To realize a comprehensive, accurate, timely and effective space weather forecasting system, there is a more urgent need for three-dimensional solar detection,” said Wang Chi, an academician of the Chinese Academy of Sciences. Therefore, in order to carry out the research on cutting-edge scientific problems in solar physics and space weather prediction, China must build its own three-dimensional solar exploration system

on the other hand, the whole project can drive the development of peripheral support technology and system. For example, there is a gap between China’s solar detection instruments and the international advanced level, and there are some shortcomings in data processing. If we are goal oriented and task oriented, our efforts in 15-20 years are expected to achieve a breakthrough in high-performance payload. At the same time, we can walk on multiple legs, forcing innovation in technical routes and data processing methods

“the three-dimensional solar exploration project will be a system engineering integrating space science, space technology and space applications.” Yang Mengfei said that its establishment will promote the intersection and integration of solar physical science research, space weather forecasting application and aerospace technology; Solve the frontier scientific problems of solar physics and improve the ability of solar activity and space weather prediction; Promote the great leap forward development of China’s solar space exploration field