Plenty of areas in the solar system are interesting for scientific purposes but hard to access by traditional rovers. Some of the most prominent are the caves and cliffs of Mars—where exposed strata could hold clues to whether life ever existed on the Red Planet. So far, none of the missions sent there has been able to explore those difficult-to-reach places. But a mission concept from a team at Stanford hopes to change that.
The concept, known as ReachBot, is a robot that can support itself using multiple articulated appendages to navigate terrain that would be difficult to reach using other navigational techniques. In addition to being able to traverse complex ground patterns, it could also, in theory, at least scale sheer cliff faces.
Deployable structures, on the other hand, are more commonly used in satellites. They decrease the space necessary to pack things like That intended target could be in the middle of a cliff or the middle of a cave, both of which are exciting areas for sample collection. If ReachBot has to ascend a cliff, it simply extends one of its appendages past the others, secures it, and then pulls itself up. Alternatively, in a cave with a rough floor, it can suspend itself off of different features, including the ceiling.In addition, ReachBot can use its other appendages to secure itself and apply force to the surface.
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