Chapter Vi. 103

THE OUTER PLANETS. Physical condition of Jupiter—Work of Zöllner and Proctor—The red spot—Satellites—Discovery of fifth satellite—Sixth and seventh satellites—Rings of Saturn: Bond, Maxwell, Keeler—Struve’s theory—Globe of Saturn—New satellites—Uranus and its satellites—Discovery of Neptune—Adams and Le Verrier—Satellite—Trans-Neptunian planets