A space tether is a cable or rope-like device used to connect two objects or spacecraft in low Earth orbit. Synonyms for space tether include space cable, space cord, space line, space leash, and space tethering system. While these words vary in the specificity of their meanings, they all refer to the same basic function of a connecting device in space. In more technical contexts, scientists and engineers may also use terms such as electrodynamic tether or momentum exchange tether to describe specific types of space tether systems with particular functionality. The use of space tethers has numerous potential applications in space exploration and industrial space endeavors, including reducing the cost and energy needed for station keeping and propulsion.