UK could use plutonium in space nuclear power demonstration

On Earth, nuclear power is controversial - but for deep space missions it is a necessity. However, the plutonium driving spacecraft power systems is invaluable not only for its ability to keep electricity flowing where solar cells cannot; Pu-238 is also in short supply.

Nuclear power is critical to the 2018 ESA-NASA ExoMars Martian rovers mission and the UK's Moonlite project. Moonlite is on hold for budgetary reasons, but would use a radioisotope heater unit. More recently two ESA-NASA joint missions, Cassini-Huygens and Ulysses, used nuclear power. More flights are planned, such as the Europa Jupiter System Mission. Continue reading...