Willy-Willy

Willy-Willy is a term used to describe a dust devil, a small, rapidly rotating wind that is made visible by the dust, dirt or debris it picks up. In space and astronautical engineering context, Willy-Willy can refer to the dust devils that occur on Mars, which have been observed by various Mars missions. These dust devils can be several kilometers high and are thought to be caused by the intense heating of the Martian surface by the sun, which creates convective currents in the atmosphere. Studying Willy-Willy on Mars can provide valuable information about the planet's atmosphere and weather patterns.
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