Discover the science behind the incredible space missions that have furthered our knowledge of the universe. Extraordinary images highlight facts about what we have learned about other planets, whether there might be other forms of life out there, and where we intend to explore next. Each title in this series contains a mission activity that poses a challenge for readers to solve. Journeys to Outer Space, How soon will you be able to board a passenger ship to Mars? And how will you survive when you get there? Explore the future of space travel and the exciting research currently under way to solve the problems of distance, fuel, and propulsion. Book jacket.