I'd like a faculty list of the Cambridge physics/astronomy departments
(a list of names and titles).  Unfortunately, I just get lost in their
websites.

I'm not sure, but it appears this is split into three departments
Physics homepage: http://www.phy.cam.ac.uk/
Department of Applied Mathematics and Theoretical Physics:
http://www.damtp.cam.ac.uk/
Institute of Astronomy: http://www.ast.cam.ac.uk/

From your links, I assume you mean Cambridge, England; not Cambridge,
Massachussets ?