How Old Is the Universe?

Astronomers have determined that the universe is 13.7 billion years old. But how did they come to such a precise conclusion? Weintraub unravels the myriad strands of reasoning, illuminating such phenomena as red giants, Cepheid variable stars, galaxy clusters, dark matter, the accelerating universe, and much more. "Magnificently presented,"---Choice. 384 pages, softcover. Princeton University.