Artificial Sun - Korean Fusion Reactor 'Artificial Sun' Sets Record For Sustaining Plasma At 100 Million Degree Celsius. This temperature is seven times that of the Sun's core, which is 15 million degrees Celsius. Nuclear fusion seeks to replicate the reaction that makes the sun and other stars shine, by fusing two atoms to unleash huge amounts of energy. Fusion has the potential to provide limitless energy without planet-warming carbon pollution. | The Brain Maze