Someone has various astronomy related models here

[willpittenger]

Everything is implemented as a Google SketchUp file. So no, these models aren't physical — yet They are, however, something that you could explore either in the free SketchUp viewer or SketchUp itself (a free version is available). SketchUp is available from sketchup.google.com. The models are here. No, I didn't have a hand in making them. I just stumbled across them while looking for something else.

 

[derekmcd]

Could you briefly describe these model before I waste my time reading them?

 

[willpittenger]

Telescopes and entire observatories. There are preview images in the link.