The book is the first edition of Space Exploration series where in a reader is introduced to the history of rocketry, motivation behind the exploration of the universe we live in and the benefits of which has been outlined. Some of the prominent milestones has been presented along with the technical aspects associated with it. Amateur rocketry has been introduced along with the chemical ,other designing challenges and simulation results of rockets has been presented. Methods, Alternates and Challenges faced in the current day space mission design and architecture as per NASA and ESA has been introduced to public in layman terms in order to help them better engage with the mission developments. Electric, Nuclear Thermal and Hybrid Propulsion systems have been introduced in simple terms, with its applications for future missions. Power sources for long term missions have been discussed along with the future prospects including commercial angles have been explored.