2025.02.05

BFRP MATERIAL FIVE-STAR RED FLAG RAISED FOR THE FIRST TIME ON THE BACK OF THE MOON

On June 4, the Five-star Red Flag was unfurled on the Chang’e-6  that landed on the back of the moon.

After completing the unmanned autonomous sampling of the lunar surface, the Five-star Red Flag carried by the Chang’e-6 lander was successfully unfurled on the back of the moon. This is the first time that China has independently and dynamically displayed the national flag on the back of the moon. Under the sunlight, this touch of “Chinese red” is particularly bright.

The basalt fiber used to make the Chang’e-6 lunar flag has a diameter of 1/3 of a hair, and the final national flag weighs only 11.3 grams.

Basalt fiber has very excellent heat insulation and radiation resistance, and can withstand the harsh environment of the lunar surface. However, basalt fiber is an inorganic fiber with a smooth surface, brittle and fragile, and high modulus. It is difficult to spin ultra-fine filaments, spinning, weaving, and construct high-fastness colors. Researchers have overcome multiple technical difficulties and used basalt melt drawing and other technologies to develop a thin, soft, strong and tough national flag, ensuring the complete success of the national flag display mission.