Gamma ray burst 2 billion light-years away impacted Earth's atmosphere as strongly as a solar flare

Last year, on October 9, we on Earth witnessed the most luminous celestial event ever recorded, by far. It was a gamma ray burst (GRB) at least 10x as bright as any other example ever seen, and it lasted 70x longer than any other known GRB. This was

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Gamma-ray burst in faraway galaxy disturbed Earth's upper atmosphere

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Gamma-ray Burst Aftermath Spotted; Astronomers Say It Occurred 2.4 Billion Light-years From Earth

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Huge solar flare is spotted on a distant star