Ron Proctor of the Ott Planetarium very helpfully pointed me to the NASA 3D repository. Checking out the Hubble Space telescope model from there, learnt the following:
- Textures need to be in UV mapping mode for them to be displayed properly in this model - Mapping -> Co-ordinates -> UV - and I had to manually map the texture bitmaps to the relevant materials in the model.
- Blender's Textured Viewport shading only works if object has a UV mapped texture (in general).
- Imported model was extremely large as seen in default Blender view. Scaling it down was easier than moving the camera and lights out.
- Ctrl Alt Numpad 0 puts Camera to current view.