Deployable structure
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A deployable structure is a structure that can change shape so as to significantly change its size.[1][2]
Examples of deployable structures are umbrellas, bistable structures, some tensegrity structures, bistable structures, some Origami shapes and scissor-like structures. Deployable structures are also used on spacecraft for deploying solar panels and solar sails.

[[File:Nustar_mast_deployed.jpg}thumb|left|600px|NuSTAR deployable mast (2009) deploys to 10 meters in length.]]