Astronomers have discovered a new kind of stellar explosion that would be powerful enough to destroy the equivalent of 3.5 billion Great Pyramids of Giza.The so-called 'micronova' is a blast that lasts for just a few hours, which makes it very difficult to observe, but it could be commonplace in the universe.These explosions take place on the surface of certain stars and can quickly burn through huge amounts of material, scientists claim.
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