When a massive star like Betelgeuse reaches the end of its life, its iron core collapses in less than a tenth of a second, shrinking from Earth-sized to city-sized, which triggers a shockwave that tears through the star's layers and causes its surface to ignite in a supernova explosion, releasing light that travels at 186,000 miles per second.
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Inside the core collapse of a giant star π #space #astronomy #betelgeuseAdded:
One day Betelgeuse will reach its final moment. The change will come without warning. Deep inside the iron core will collapse in less than a tenth of a second. A sphere the size of Earth will shrink to the size of a city and gravity will unleash a shockwave that tears through the star's layers.
In the time it takes to blink, Betelgeuse's surface will ignite in a burst of light that races across space at 186,000 miles per second.
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