This book brings Einstein's general relativity into action in new ways at scales ranging from the tiny Planck scale to the scale of immense galactic clusters. It presents the case that Einstein's theory of gravity can describe the observed dynamics of galaxies without invoking the unknown "dark matter" required in models based on Newtonian gravity.

Drawing on the author's experience as a lecturer and on his own research, the book covers the essentials of Einstein's special and general relativity at a level accessible to undergraduate students. The early chapters provide a compact...

This richly illustrated book is unique in exploring Einstein's relativity at a higher level for the non-specialist than ever before, using nothing more than grade-school algebra. It also explains how the theory applies to phenomena such as black holes.