So I am doing research for the different energy sources that might be available for a space base in about fifty years from now. Some of these energy sources would likely be solar, fusion, fission, Nuclear, and I heard of radio - nuclide as well. What else could be used? In addition, does anyone know much about radio - nuclide power? In addition, suppose that this base was managed by robots, what kind of energy sources could we possibly use to power these robots?