I quite like the HFS Space System...

http://www.renderosity.com/mod/bcs/hfs-space-system-space-dome/93061/

...unfortunately, it's for DS, not Poser.  I'm looking for something with the same capabilities - essentially a big sphere with MATs.  Ideally for deep space, middle-space (solar system), and close in near planets.  All in one :-)  Or stitch it together with expansions.

Anyone care to recommend a package?