Anthony Aveni is one of the pioneers in the field of archaeoastronomy, which traces how different cultures throughout the ages have interpreted the skies and planets. He has just written a book, "Conversing with the Planets." In it, he weaves together cosmology, mythology, and anthropology, to look at the significance of stars and how they have been perceived in various cultures. Aveni is a professor of Physics and Astronomy, as well as Sociology and Anthropology, at Colgate University.