Naturally, there will be some orbiting stations around the Earth and Moon that act as go-betweens to the Earth, Moon and beyond.<br /><br />Near Earth's orbit, any stations there would be subject to slow orbital decay, but this can be routinely re-adjusted.<br /><br />The best orbits are at the stable <a href="http://en.wikipedia.org/wiki/Lagrangian_point">Lagrangian points</a>. L1, 2 and 3 are the most stable, but you can only place one station at each point, or have two counter-rotating stations circling each other like they do in the <i>Gundam</i> series. L4 and 5 allow for a number of smaller stations within there "triangular points", but they are not as stable. L1 would be a major hub between the Earth and the Moon.<br /><br />The question is what types of stations would one find at each point. If the science allows for super-strong materials, then large space colonies (like <a href="http://en.wikipedia.org/wiki/Island_Three">O'Neill cylinders</a>, <a href="http://en.wikipedia.org/wiki/Stanford_torus">Stanford torus</a> or <a href="http://en.wikipedia.org/wiki/Bernal_sphere">Bernal spheres</a>) and <a href="http://en.wikipedia.org/wiki/Space_elevator">space elevators</a> are possible. Otherwise, stations would be scaled-down versions of the examples above - think of the Stanford torus from <i>2001: A Space Odyssey</i>. Naturally, super-structures would really change the scope of the setting.<br /><br />If there are space elevators, then space would be alot more assessable, as people, equipment and fuel can be sent up to the "anchor" (a captured asteroid or weighted station), and then they can be transported elsewhere by shuttles. Basically, no need for fuel-consuming tack-offs, and no dangerous reentries. Plus, solar-collectors can send power back down to Earth like a 35,800 km long power-line (you get more solar power in space, then on Earth).<br />
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