A fission rocket is a type of propulsion system that utilizes nuclear fission to heat propellant and generate thrust. In the context of space travel, this technology has the potential to revolutionize our ability to explore the universe beyond our solar system. Synonyms for fission rocket include nuclear rocket, thermonuclear rocket, and atomic rocket. Variants of these terms also exist, such as fusion-fission rockets and aneutronic fusion rockets. Regardless of the terminology used, the concept behind these propulsion systems remains the same: harnessing the immense power of nuclear reactions to propel spacecraft farther and faster than ever before.