www.wikipedia.org A comprehensive and extensive online encyclopedia, with up-to-date, current information and images. Easy to read and understand; provides excellent explanations of scientific and mathematical terms.
The Scientific Companion: Exploring the Physical World with Facts, Figures and Formulas
. New York: Wiley Popular Science, 1995. Technical description of the formation of the universe and mathematical discussion of the planets; see chapters 7 and 8.
Hartmann, W. K.
Moons and Planets: Third Edition
. Belmont, CA: Wadsworth Publishing Company, 1993. Comprehensive book about planets and their formation.
Atlas Basico de Astronomia
. Barcelona, Spain: Parramon, 2005. Atlas of astronomy in Spanish with basic explanations and color images. Could be read to the class.