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South Korea’s artificial sun just hit a major fusion milestone. The KSTAR reactor managed to sustain plasma at 100 million°C for 48 seconds, around seven times hotter than the core of the Sun bringing scientists one step closer to controlled nuclear fusion energy. In this video, we break down how KSTAR works, why fusion reactors need temperatures hotter than the Sun, and how superconducting magnets hold plasma in midair without touching the walls of the machine. We also explain why the tungsten divertor upgrade was critical, how KSTAR beat its previous 30-second record, and why sustaining high-temperature plasma matters for future fusion power plants. This breakthrough is not just about one reactor in South Korea. KSTAR’s data supports global fusion research, including ITER in France, and helps test the technologies needed for future DEMO fusion reactors that could one day put clean fusion electricity onto the grid. Could South Korea’s artificial sun be one of the biggest clean energy breakthroughs of the decade? #KSTAR #FusionEnergy #ArtificialSun #NuclearFusion #SouthKorea #CleanEnergy #FutureTech