On April 24, at the main venue of China space day in Nanjing,Two lunar samples and one lunar soil sample were shown to the public for the first time. This is also the first time that chang'e-5 lunar samples have been publicly displayed outside Beijing.
According to the official, this is conducive to fully demonstrating the brilliant achievements of China's lunar exploration project, carrying out patriotic education and public welfare science popularization, so that more people can really visit the lunar samples, get them from the people and use them for the people.
includeSample box, trapezoidal base, optical magnifier
Among them,The sample box is used to seal and store samples. The center diameter is 20 mm and the sample weight is 75 mg.The trapezoidal base is used to display and highlight the sample box. The whole box is made of special glass, and the hemispherical optical magnifier is used to magnify the sample for viewing.
Side length of base bottom22.89cmIt means that the mission of chang'e-5 from launch to return lasts 22.89 days;
Upper side length17.31cm, symbolChang'e-5 collected 1731g of lunar soil；
height17.0cmIt symbolizes the 17 years from the official implementation of Chang'e project in 2004 to the return of chang'e-5 in 2020.
includeSample box, trapezoidal base, ball matching magnifying glassThe overall configuration is a round moon on a three-layer platform, with the moon sample in the middle. It means that chang'e-5 mission will get the first lunar sample from Chinese people and return to earth. I wish China's lunar exploration project a stable and far-reaching future.
The center diameter of the sample box is 20 mm, and the sample weight is 77 mg.The trapezoidal base is used to display and highlight the sample box. The whole box is made of special glass, and the optical magnifying glass is a full moon ball.
Base width17cmIt symbolizes the 17 years from the implementation of Chang'e project in 2004 to the return of chang'e-5 in 2020;
Overall height of exhibits22.89cm； The mission of chang'e-5 from launch to return lasts 22.89 days;
Three step base
Exhibit 3: lunar soil test piece
In order to enable the audience to see the micro components of lunar samples more clearly, a lunar soil sample was placed in the exhibition hall. Under the microscope, the lunar soil particles were scattered.
Lunar soil refers to the unique soil on the moon. It is a layer of soil like mixture with a thickness of several to ten meters distributed on the surface of the moon. It is formed after the lunar rocks are subjected to space weathering such as meteorite impact, solar wind bombardment and cosmic ray radiation.
Lunar soil contains a variety of lunar rock fragments, minerals and meteorites, and records the history of lunar surface impact and solar activity.
According to the introduction, the basic composition particles of lunar regolith include: mineral debris (olivine / plagioclase / pyroxene / ilmenite / spinel, etc.), original crystalline rock debris (Basalt / plagioclase / peridotite / norite, etc.), breccia debris, various glasses (molten rock / micro breccia / impact glass / yellow or black pyroclastic glass), unique lunar regolith component cohesive agglomerate, and so on Meteorite debris, etc.
In addition to titanium, iron, thorium, uranium, rare earth elements and other resources, lunar soil is also rich in chromium, nickel, potassium, sodium, magnesium, silicon, copper and other metal mineral resources.
Lunar rocks and minerals are the main sources of information for the study of lunar resources, material composition, formation and evolution. The collection of lunar profile samples and lunar rock samples is of great significance to the investigation of lunar surface resources, lunar material composition, lunar physics, lunar surface processes and the history of solar activity.
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