Sunday, 7 October 2012

mars - How are parachutes usable in other places than Earth?

Parachutes have never been used on the moon, but they are viable for Mars because Mars does have an atmosphere - albiet one much lighter than that of Earth. For that reason, parachutes cannot be the only means of slowing down on Mars --- for example, in the case of the Curiosity Rover, that's why an elaborate booster and crane combination was used (see figure). Another approach, taken by the Pathfinder Rover, was to use large airbags to bounce on landing.



One benefit to using parachutes on Mars, is that they can be used at higher velocities --- unlike on Earth where the heavier atmosphere (and thus stronger drag force) would shred a parachute at comparable speeds.



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