A few words about the lunar surface
Did you know that lunar surface is one of the worst terrains known to man?
The top layer, usually about 10 cm deep, is covered with fine dust. The regolith below is made of dust and relativelly small particles.
Bombarded by meteors, micrometeors and charged particles for over 4,6 billion years, the dust particles became smaller than the particles found in baby powder or volcanic dust.
Due to its chemical composition it has a capability of being electrically charged.
All of this makes movement on the lunar surface very demanding, so in addition to heating/cooling, vacuum and radiation problems, the dust can make any standard bearing stuck withing a few meters of travel. Because there is no air between the particles of dust, like you would find here on Earth, the dust is settled and very thick and sticky. Our engineers are planning to overcome these problems both in the vehicle design and selection of components for the rover.
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