Source: wikibot/fission-sail
= Fission sail
{wiki=Fission_sail}
A fission sail is a theoretical spacecraft propulsion concept that combines nuclear fission reactions with a large, lightweight sail to generate thrust. The idea is to use the energy produced from nuclear fission reactions—similar to those in a nuclear reactor—to heat a propellant (such as hydrogen) or generate a significant amount of photons. The sail then captures this energy, providing thrust to propel the spacecraft.