TRUE

This claim is accurate. While the core of the Sun maintains a temperature of approximately 15 million degrees Celsius, terrestrial nuclear fusion experiments must reach much higher temperatures to overcome the lack of extreme gravitational pressure found in stars. In Inertial Confinement Fusion (ICF) at the National Ignition Facility (NIF), the final stage of a fuel capsule's compression leads to ignition, where temperatures exceed 100 million degrees Celsius (Los Alamos National Laboratory, 2026). Similar conditions are achieved in magnetic confinement reactors; for example, South Korea's KSTAR reactor has sustained temperatures of 100 million degrees Celsius, which is roughly seven times hotter than the solar core (Indy100, 2024). Furthermore, high-energy particle collisions at the Large Hadron Collider can momentarily reach temperatures hundreds of thousands of times hotter than the Sun's core (CERN, 2026). These extreme temperatures also characterize the final stages of thermonuclear weapon detonations and the iron-fusing phase of massive stars before a supernova (UKAEA, 2024).