It depends on what kind of textures you have and how you want to apply them.
Are they just plain photos, or are they spherical maps (like a landmap of
the entire planet)? Such landmaps can be put onto the spheres for the
planets like this:

sphere{0,1 pigment{image_map {jpeg "earth.jpg" map_type 1}}}

Then you just scale the sphere to your desired size and translate it to your
desired location.

Regards,
Tim

-- 
"Tim Nikias v2.0"
Homepage: <http://www.nolights.de>

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