Why does the dust float on the moon?
In the 1960s, the dust layer that floats on the Moon was seen for the first time, thanks to the Surveyor probe and the astronauts of the Apollo mission, but so far this strange phenomenon has not been explained.
In addition to the Moon, the same phenomenon occurs in asteroids, in the rings of the planets and around the spacecraft. Apparently, the suspended dust layer is due to ultraviolet photons coming from the Sun. Photons cause dust particles to lose electrons and be charged positively.
At the same time, the electrons of the superficial rocks pass to the superior dust grains and are negatively charged. Finally, the dust loaded negatively stays on the ground and the one with positive load floats a few meters from the ground.
The positive charge of the Moon will cause the separation of the floating layer and the gravitational force will attract it. The powder layer of about 30 centimeters is suspended in balance.
Researchers at the University of Colorado wanted to check in the laboratory the theory exposed and have observed that positive and negative dust particles are formed as shown. However, they have not yet managed to copy the suspended layer. A good understanding of the phenomenon can prevent dust from damaging satellite sensors and probes, telescope lenses, astronaut suits, etc.
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