Explores the shared quest of ancient prophets and today's astronomers to explain the strange phenomena of our skies-from the apocalypse foretold in Revelations to modern science's ongoing identification of multiple cataclysmic threats, including the impact of comets and asteroids on earthly life, the likelihood of future collisions, the meaning of solar eclipses and the death of stars, the implications of black holes for time travel, and the ultimate fate of the universe and time.