This book features eight remarkable spacecraft that ventured to the outer planets?Jupiter, Saturn, Uranus, Neptune?and the dwarf planet Pluto. It delves into the complex engineering behind each mission, detailing the spacecraft systems and the sophisticated scientific instruments they carried. Tracing the journey of outer planet exploration, the book narrates the evolution of spacecraft technology that helped unveil the long-sought secrets of these distant worlds. The innovative designs reflect the dedication and brilliance of the engineers and scientists who worked with the best technology available at the time. Clever workarounds devised in response to mission-critical failures serve as powerful examples of human ingenuity and perseverance. The book also presents key scientific discoveries from each mission, along with stunning visuals, offering an engaging overview of their achievements. It serves as a companion to Spacecraft that Explored the Inner Planets: Venus and Mercury, published by Springer in 2023.