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Sleep Science · Sunday · 1 hr 55 min

What Actually Happens When a Star Explodes

Close your eyes and imagine a star whose time has come—a cosmic giant that has run out of fuel and is about to unleash the most violent event in the universe. When a massive star, at least eight times heavier than our Sun, can no longer sustain the fusion of iron in its core, gravity wins the ancient battle . The core collapses in less than a second, reaching temperatures over 100 billion degrees, and then recoils, sending a shockwave that tears the star apart . In moments, the star outshines an entire galaxy, and a supernova remnant is born—an expanding shell of gas and heavy elements that will seed new stars and planets .

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Close your eyes and imagine a star whose time has come—a cosmic giant that has run out of fuel and is about to unleash the most violent event in the universe. When a massive star, at least eight times heavier than our Sun, can no longer sustain the fusion of iron in its core, gravity wins the ancient battle . The core collapses in less than a second, reaching temperatures over 100 billion degrees, and then recoils, sending a shockwave that tears the star apart . In moments, the star outshines an entire galaxy, and a supernova remnant is born—an expanding shell of gas and heavy elements that will seed new stars and planets .
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