Lunar samples of Chang’e 5 out of Beijing for the first time: a magical world under the microscope
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Exhibits 1: “A bright moon on the sea”
Includes three parts: a sample box, a trapezoidal base, and an optical magnifying glass. The overall configuration is a round moon slowly rising from the sea level. Taking the Chang’e 5 moon sample as the center, it integrates the cosmology and philosophical ideas of the ancient “round sky” to show Chinese wisdom and power.
Among them, the sample box is used to seal and store samples, the center diameter of 20mm area is the sample, and the sample weight is 75mg. The trapezoidal base is used to display and highlight the sample box, and the whole is made of special glass, and the hemispherical optical magnifying glass is used to enlarge the sample for easy viewing.
The bottom side of the base is 22.89cm long, which symbolizes the mission time of Chang’e-5 from launch to return. The mission time is 22.89 days;
The upper side is 17.31cm long, which symbolizes Chang’e-5 collecting moon soil 1731g;
The height is 17.0cm, which symbolizes the 17 years from the official implementation of the Chang’e Project in 2004 to the return of Chang’e 5 in 2020.
Exhibit 2: “The bright moon shines upon me”
Includes three parts: sample box, trapezoidal base, and doubling ball magnifying glass. The overall configuration is a three-layer platform. The round moon is round, and the middle of the sphere is the lunar sample. It means that the Chang’e 5 mission obtained the first lunar sample from the Chinese and returned to the earth. I wish China’s lunar exploration project will be stable and far-reaching and illuminate the future.
The 20mm diameter area in the center of the sample box is the sample, and the sample weight is 77mg. The trapezoid base is used to display and highlight the sample box, the whole is made of special glass, and the optical magnifying glass is a full moon ball.
The bottom of the base is 17cm wide, which symbolizes the 17 years from the official implementation of the Chang’e Project in 2004 to the return of Chang’e 5 in 2020;
The overall height of the exhibits is 22.89cm; it symbolizes the self-reliance of Chang’e 5. The mission time from launch to return is 22.89 days;
The three-step base represents the three-step strategy of “around”, “fall” and “return” for the lunar exploration project, implying that China’s lunar exploration project has one step at a time and one step at a time. .
In order to enable the audience to see the microscopic components of the lunar sample more clearly, a lunar soil test piece is also placed in the exhibition hall , Under the microscope, the lunar soil particles are scattered.
Lunar soil (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. The lunar rocks are hit by meteorites and bombarded by solar wind. It is formed after space weathering such as cosmic ray radiation.
The lunar soil contains various lunar rock fragments, minerals and meteorites, and records the history of impacts on the moon’s surface and solar activity.
According to reports, the basic composition particles of lunar soil include: mineral debris (olivine/plagioclase/pyroxene/ Ilmenite/spinel, etc.), primitive crystalline rock fragments (basalt/plagioclase/peridotite/sulongite, etc.), breccia fragments, various glasses (melted rock/microbreccia/impact glass/ Yellow or black igneous fragment glass), unique lunar soil components bonded agglomerates, meteorite fragments, etc.
The sorting properties of lunar soil are generally poor. The particle size is similar to that of silt sand, but the distribution range is very wide. The particle diameter is mainly less than 1mm, and most of the particles are between 30μm and 1mm in diameter. The value of the particle size is between 40μm and 130μm, with an average of 70μm.
In addition to the resources of titanium, iron, thorium, uranium, and rare earth elements, the lunar soil also contains rich metal mineral resources such as chromium, nickel, potassium, sodium, magnesium, silicon, and copper.
Lunar rocks and minerals are the main source of information for studying lunar resources, material composition, formation and evolution. The collection of lunar profile samples and lunar rock samples is of great significance to lunar surface resource surveys, lunar material composition, lunar physics research, lunar surface processes and solar activity history.