So: what is the philosophical significance of the Kant-Laplace hypothesis, otherwise known as the "nebular hypothesis," which nowadays rules the roost of origin-of-solar-system views? In chronology, by the way, Kant was way ahead of Laplace, although Laplace gets his name on the theory due to his more analytical, mathematical treatment of the subject. And I've just put Laplace's picture in here. Now, is there any worthwhile connection we may draw between Kant the astronomer and Kant the philosopher? I think there is. The nebular hypothesis is a blow (how serious a blow I leave to the reader's own intuition, but surely some sort of a blow) to the single most psychologically powerful argument for the existence of a Providential, supernatural Being -- the argument from design. After all, the solar system, with its marvellous equilibrium and its subtle but overwhelming predictability, is Exhibit A for the designedness of the universe, is it not? Yet Kant's...