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The Russian device PmL-Ch7 is designed for dust monitoring of the Moon as part of the Chinese mission Chang'e-7.
The Russian device for dust monitoring of the Moon PML-Ch7 at the Chinese automatic station (AMS) Chang'e-7 will, in particular, test the model of the movement of lunar dust. Leading engineer, coordinator of international projects at the Space Research Institute (IKI) of the Russian Academy of Sciences (RAN) Dmitry Zarubin told RIA Novosti about this.
“According to him, studying the movement of dust is necessary for greater safety of promising missions to the Moon. That is, we will be able to look at the concentration of particles, their charge, speed and mass,” the specialist said.
In August, the launch of China's Chang'e-7 lunar mission was postponed indefinitely because, according to Xinhua, the spacecraft "does not meet launch conditions, so its departure cannot take place at the scheduled time this year."

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The Russian instrument PmL-Ch7, installed on the Chinese lunar probe Chang'e-7, will test mathematical models of the movement of lunar dust, including natural and disturbed movement under the influence of space technology. The launch of the mission has been postponed to 2027, the instrument is in the preparation stage. Engineer Dmitry Zarubin from the Institute of Space Research of the Russian Academy of Sciences emphasized the danger of lunar dust for technology and humans due to its toxic effects and levitation above the surface of the Moon.