We’re a step closer to limitless energy. The Korea Institute of Fusion Energy has set a new record by running at one million degrees and maintaining super-hot plasma for 30 seconds, beating its own previous record by 10 seconds, a report by New Atlas reveals.

The tokamak reactor used for the record run is the Korea Superconducting Tokamak Advanced Research (KSTAR), which is also known as South Korea’s artificial sun.