JAY ANDERSON is a meteorologist, formerly with the Meteorological Service of Environment Canada. He lives in Winnipeg. JAY PASACHOFF is an astronomer, Field Memorial Professor of Astronomy, and Director of the Hopkins Observatory at Williams College. He is the author of the Peterson Field Guide to the Stars and Planets. He is also coauthor of a leading astronomy survey text, The Cosmos: Astronomy in the New Millennium and coauthor of Cosmos: The Art and Science of the Universe. He lives in Williamstown, Massachusetts. JOHN A. DAY was a weather forecaster, a professor of physics and meteorology, a researcher studying cloud physics, and an author of college texts on weather.