How do mathematical models explain the cosmos? Ian Stewart, winner of several awards for popularizing science, provides a compelling guide to the mechanics of the cosmos, from our solar system to the entire universe. He describes the architecture of space and time, dark matter and dark energy, tells how galaxies formed and why stars explode, how it all began and how it all might end. He discusses parallel universes, the problem of fine-tuning the cosmos to make it possible to live in it, what forms extraterrestrial life can take, and how likely our earthly one is to be swept away by an asteroid impact. Cosmic Mathematics is an exciting and exciting mathematical quest to explore the details of the inner world of astronomy and cosmology.