For more about Kant's Nebular Hypothesis, visit physicist Dr. Russell McNeil's essay on Kant.

These publications offer brief, easy-to-understand summaries of Kantian ethics:

Grassian, V. Moral Reasoning: Ethical Theory and Some Contemporary Moral Problems (Saddle River, NJ.: Prentice Hall, 1992; Chapter 10)

Kuehn, M. Kant: A Biography (Cambridge, MA: Cambridge University Press, 1986)

Pojman, L. Ethics: Discovering Right and Wrong. (Beverly, MA: Wadsworth Publishing Company, 1999; Chapter 7)

Sommers, C. Right and Wrong: Basic Readings in Ethics (New York: Harcourt Brace Jovanovich Publishers, 1986; Chapter 1)