Devil Comet' 12P/Pons-Brooks is approaching Earth. Why is it flaring up, 'horns' and all?

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The exact cause of 'Devil Comet' 12P/Pons-Brooks' flare-ups is unknown, though the best guess is that perhaps a fissure has developed on the comet's nucleus due to a build-up of gas.

Devil Comet' 12P/Pons-Brooks is approaching Earth. Why is it flaring up, 'horns' and all? : Read more