The Korea Superconducting Tokamak Advanced Research or KSTAR had previously set a record of reaching 100 million degree plasma for 30 seconds in 2021, reported the Korea Institute of Fusion Energy (KFE).

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Nuclear fusion happens when two light atoms’ nuclei merge to form a single heavier one, generating a huge release of energy.

This phenomenon powers stars, including the sun, which is why KSTAR has been nicknamed an “artificial sun”.