infinite space

hello, Im making an open world space game and unity’s limitations are causing a problem for me. so my question is: how would i simulate infinite space without sacrificing the prcision of unity’s coordinate system? t
thanks

Some links:

http://forum.unity3d.com/threads/74841-Infinite-Level
http://forum.unity3d.com/threads/169561-Endless-running-game-What-is-really-moving-camera-or-world
http://forum.unity3d.com/threads/150621-Best-way-to-tackle-an-endless-road