On the morning of December 19, NASA held a Lunar Sample handover ceremony for the chang’e-5 mission in Beijing. Together with some participating units, they witnessed the handover of the samples to the mission ground application system, marking the official transition of the chang’e-5 mission from the implementation stage of the project to a new stage of scientific research, which is the first time for China to store, analyze and test samples of extraterrestrial objects The research work started.
At the site of the handover ceremony, Zhang Kejian, director of the National Space Administration and chief commander of the lunar exploration project, handed over the chang’e-5 sample container and the sample certificate to Hou Jianguo, President of the Chinese Academy of Sciences. After the preliminary measurement, about 1731g lunar samples were collected by the chang’e-5 mission. After the samples are safely transported to the Lunar Sample Laboratory, the researchers of the ground application system will carry out the storage, preparation, and processing of the lunar samples as planned, and start the scientific research work.
Wu Yanhua, deputy director of the National Space Administration and deputy chief commander of the lunar exploration project, previously said that China is the third country to sample from the moon. There will be three types of uses for lunar samples: the first category, the most important purpose, is to conduct scientific research; the second category, some samples will be put into the National Museum of Tibet for public display and popular science education; and the third category, according to the international cooperation conventions and multilateral and bilateral cooperation agreements, we will release the management measures of lunar samples and data with the relevant countries and the world’s science and technology Experts share. Some of them may be sent as national gifts according to international practice. For example, the United Nations foreign space Department has proposed that it is currently under discussion.
The National Astronomical Observatory of the Chinese Academy of Sciences in Beijing will be the main storage site. At the same time, it will carry out remote disaster recovery in the hometown of Chairman Mao in Shaoshan, Hunan Province.
The Soviet Union had brought back 301 grams of lunar samples through three missions, and the United States had brought back about 381 kilograms through six missions. During Brzezinski’s visit to China in 1978, he presented 1 gram of lunar samples, of which 0.5 grams were used for research.
The National Astronomical Observatory has built the first “Lunar Sample Laboratory” in China, and has the ability to store, process, and analyze “extraterrestrial samples”. According to the different sampling methods and sample usage, the samples collected this time can be divided into four categories: temporary storage of drilling samples, temporary storage of surface samples, permanent storage of drilling samples, and permanent storage of surface samples.
A temporary storage device for meter sampling
A temporary storage device for drilling and sampling
Zou Yongliao, director of the General Department of lunar and deep space exploration of the Chinese Academy of Sciences, said in an interview with Xinhua news agency that there are many possibilities for the use of lunar samples: it is of great significance to understand the composition characteristics of the sampling area (rock types, mineral components, chemical components, etc.), the interaction between lunar surface materials and solar wind, and the pedogenic mechanism of lunar soil.
According to the actual composition characteristics, if the samples collected are or produced from ancient plagioclase materials, it is of great scientific value to study the early history of the moon. If the samples collected have or come from the moon sea basalt, it is of great value to the study of lunar volcanism and thermal history. If the samples collected contain impact breccia, it is of great value to study the impact of the moon and its impact effect.
One thing must be soberly realized that only a sample of one point can have a more profound and reliable scientific value on the basis of comprehensive research with historical data/achievements.
Source: observer network synthesis
Source: observer network synthesis