While teaching his first-ever introductory college astronomy course, I heard a graduate student make the comment that compared to other areas of astronomy, studying the solar system is just "stamp collecting." Coverage of the solar system in an introductory college astronomy course certainly "could" consist mostly of showing images and reporting facts, but by "using" observations that can be made from images and also data and other known facts about the objects, instruction on solar system topics can be more conceptual, involving just as much inquiry and discovery as any area of astronomy or physics.