 This paper discusses the use of redundant circuitry in space electronics to improve reliability. It compares several different redundancy techniques, including triple modular redundancy, TMR, selective TMR, STMR, partially approximate TMR, PTMR, fully approximate TMR, FATMR, and majority voting-based reduced-precision redundancy, VRPR. The authors conclude that VRPR is the most promising technique for space applications, because it provides improved reliability while maintaining a smaller size and lower power consumption than other techniques. This article was authored by Padmanabhan Balasubramanian.