Here’s why humanity won’t survive our own Sun. The Sun looks calm from Earth, but it’s slowly changing. As hydrogen in its core is fused into helium, the Sun heats up and becomes brighter over time. In about 1 billion years, Earth will enter a runaway greenhouse state: the oceans evaporate, the atmosphere collapses, and life ends long before the Sun physically touches our world. But the true ending arrives 5 billion years from now, when the Sun expands into a red giant large enough to erase Eart
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👉☀️ 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
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