Have you ever wondered what it would be like to have a miniature star on Earth, providing us with an inexhaustible source of energy? In the brief span of a finger snap, the Sun releases enough energy to power our civilization for 4,500 years. This fact alone has sparked the imaginations of scientists and engineers, driving them to build a star-like reactor that could plug into our power grid. But the twist is, we already have something akin to it, albeit not in the form of a tiny floating star in a lab.