NASA Free 3D Models Library
Here is a library of free 3D models published by NASA.
These models are for anybody that uses a 3D software package. Most of the models are in the common .3ds format, which can be read by most 3D programs. Some models, however, are in their original .lwo, .fbx, or .obj formats to preserve details that would be lost in conversion.
I quickly tested some of these models in GeeXLab 0.2.0. As they say, some details like correct textures filenames (especially for .3ds files) or global position are lost during the conversion to .3ds or .obj files. So a bit of tweaking is required for some models…