sentence: Current materials are already sufficiently strong to construct such an elevator.
sentences_before: A Martian tether could be much shorter than one on Earth. Mars' surface gravity is 38 percent of Earth's, while it rotates around its axis in about the same time as Earth. Because of this, Martian stationary orbit is much closer to the surface, and hence the elevator would be much shorter.
sentences_after: Carnegie Mellon University. Interestingly enough, they are already more than strong enough for constructing skyhooks on the moon and Mars.
concept_name: current material
headings: Space elevator Extraterrestrial elevators
categories: Exploratory engineering Megastructures Space colonization Spacecraft propulsion Spaceflight technologies Vertical transport devices Space access Hypothetical technology Emerging technologies