How It Works
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Where is Betelgeuse?

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With a diameter large enough to swallow up Jupiter’s orbit around the Sun, Betelgeuse is the closest supergiant star to Earth 640 light years away in the Orion constellation. Nearing the end of its life, it has developed a series of internal shells creating energy from the fusion of various elements, increasing its energy output to the equivalent of 120,000 Suns. The pressure of radiation pouring out from the star’s interior has caused its outer layers to balloon to a vast size and cool to a deep red.