What will happen when Betelgeuse explodes?

(Starts With A Bang!) – Ethan Siegel:

At only 600-or-so light years distant, Betelgeuse will be far closer than any supernova ever recorded by humanity. It’s fortunately still far away enough that it poses no danger to us. Our planet’s magnetic field will easily deflect any energetic particles that happen to come our way, and it’s distant enough that the high-energy radiation reaching us will be so low-density that it will have less of an impact on you than the banana you had at breakfast. But oh, will it ever appear bright.

Not only will Betelgeuse be visible during the day, but it will rival the Moon for the second-brightest object in the sky. …

starts-with-a-bang df5b04164b2

Orion with simulated supernova Betelgeuse

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