👉☀️ How the Sun Produces Its Energy Every second, the Sun transforms about 600 million tons of hydrogen into helium through a powerful process known as nuclear fusion deep inside its core. At the Sun’s center, temperatures soar to roughly 15 million°C, and the pressure is unimaginably intense. In this extreme environment, hydrogen nuclei (protons) crash into each other and fuse together. This reaction — called the proton–proton chain — is the main energy source for stars like our Sun. --- 🔬 Wh