Great Example of a Gamma Ray Burst’s power

7.5 billion years ago, 7.5 billion light years from us, a star exploded.

The light from this gamma ray burst took until last month to be reach Earth. For a couple of hours this explosion was visible to the naked eye, making it the most distant thing a human has ever seen unaided.

Consider the power behind such a burst, to be visible from the other end of the universe. And wonder how much it could harm you if it occured much closer to home.

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