Massachusetts Institute of Technology
Mit: Open Course Ware: Courses: Extrasolar Planets: Physics and Detection
A university-level course that examines the atmospheres and interiors of extrasolar planets, or exoplanets. The course also looks at the search for planets that could support life. Includes lecture notes and assignments.
NASA
Nasa: Jet Propulsion Laboratory: Planet Quest: Exoplanet Exploration
Constellation of articles, images, diagrams, posters, videos, and more on the subject of the search for planets, particularly Earth-like planets, outside our solar system.