Orbiter -- worth a look...

Martin has once again updated Orbiter, a first class space simulation which is also freeware. If you get a chance, go check out:www.orbitersim.comThe graphics are fantastic, and the sim is a very absorbing way to lose oneself in the universe. I must warn you that it's a sim which requires thought...orbital mechanics, atmospheric drag, planetary transfer orbits--these are all things that come into play. But if you feel a need to leave the atmosphere, there's nothing better!John, KPHX