Paul S. Wesson
I give a compact, pedagogical review of our present understanding of the universe as based on general relativity. This includes the uniform models, with special reference to the cosmological ‘constant’; and the equations for spherically-symmetric systems, in a particularly convenient form that aids their application to astrophysics. New ideas in research are also outlined, notably involving extra dimensions….
Read more: http://arxiv.org/ftp/arxiv/papers/1208/1208.3433.pdf