[en] Crucial to the future of nuclear energy will be the disposal of nuclear wastes. Transporting radioactive waste into space is an economical alternative which will be feasible within 20 years. Major space-disposal destinations already considered include injection into the Sun, solar-system escape, placement on the Moon or in lunar orbit, placement in a high Earth orbit and injection into a heliocentric orbit. The space option separates the worst wastes from the terrestrial environment for either interim storage or for final dumping. Nuclear waste disposal in space should present a lower long-term risk to mankind than options calling for disposal on Earth. (orig.)