In this book, one of the world's foremost authorities on comets takes us on a voyage of discovery from the earliest speculations on the meaning of comets to his own pioneering research into both the nature of comets and the mysteries of our solar system. Professor Whipple begins by examining the earliest observations and notions of comets from the first recorded observation by the Chinese in 2315 B.C. to the cosmogonies and mythologies of the Babylonians...