400. That’s an error.

Google cannot redirect you to http://worldcat.org/search?q=Sternen oder Cometen-Buch, welchem die fürnemsten Cometen, deren bei 180 ... dem Firmament erschienen, sampt anderen Meteorologicis ... Beschriben vnd Teutsche Rhytmos gestellet (etc.) because the request was invalid.

This might be because the link was created a long time ago. Try your search again on Google. That’s all we know.