Cosmic Horizons Astronomy at the Cutting Edge

Steven Soter is a member of the Department of Astrophysics at the American Museum of Natural History. He was a co-writer, with Carl Sagan and Ann Druyan, of the Cosmos television series, and co-author with Ann Druyan of the new Hayden Planetarium's inaugural sky show.

Neil de Grasse Tyson is director of New York City's Hayden Planetarium. He has authored five books on the universe, including The Sky Is Not the Limit: Adventures of an Urban Astrophysicist. He is also a monthly columnist for Natural History magazine and was the project scientist for the Hall of the Universe in the Rose Center for Earth and Space.