In Search Of Planet Vulcan: The Ghost In Newton's Clockwork Universe

Richard Baum served as Vice President of the British Astronomical Association from 19931995 and is the author of The Planets: Some Myths and Realities. He lives in Chester, England.

William Sheehan is a psychologist and amateur astronomer who has written several books including Planets and Perception, Worlds in the Sky, The Planet Mars, and The Immortal Fire Within. He lives in Hutchinson, Minnesota.