So there is a similar question, I read it but I am thinking a little differently. So instead of a big tower going into orbit with cables like an elevator, what if we had a satellite in orbit, something that can move to various orbits and positions. This satellite has a long cable it drops to the earth to pre-determined "Bear Traps" like we do to help land helicopters onto Frigates in rough seas. Once the cable is secured payloads are loaded, the bear trap released, and the whole thing reeled in to the orbiting satellite. From there it is loaded onto docked spaceships to be sent to the moon or where ever. Is that more practical/realistic than a big tower going from the ground up? You know considering the materials are available to withstand the stresses. Would this setup require stronger materials than the earth up tower/elevator?
It turns out that this is just the thing that I was envisioning. It seems that in the last half century (or probably longer) a wide variety of schemes for getting to space have been explored in the spaceflight engineering (as well as SciFi) community.
From the (extensive) Wikipedia article:
A momentum exchange tether is a kind of space tether that could theorically be used as a launch system, or to change spacecraft orbits. Momentum exchange tethers create a controlled force on the end-masses of the system due to the pseudo-force known as centrifugal force.