This book provides the definitive blueprint for designing and understanding the resilient, autonomous hardware capable of surviving the harshest environments in the universe. As we venture into deep space beyond low-Earth orbit, space missions depend entirely on space electronics technology. The technological constraints of traditional electronics prevent proper adaptation to deep space requirements for extreme radiation conditions, wide temperature variations, long operational times without maintenance support, and delayed communication pathways. There is a growing need for next-generation space electronics to be robust and radiation-hardened while performing energy-efficient intelligent operations as highly autonomous systems. This book presents innovative space electronics that drive modern deep space expedition practices. It examines deep space electronics by discussing their radiation-resistant elements, intelligent systems, and quantum data exchange, together with next-level propulsion systems. Focusing on filling the need for advanced electronics that provide efficiency and resilience in deep space exploration, the book provides a solution for understanding the quickly changing realm of space electronics technology. Through real-world case studies and expert insights, this book provides operational knowledge about modern technologies to help readers construct dependable systems that support deep space investigation.