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Babylon4All t1_jdtnobm wrote

Reply to comment by lawless_c in Scientists discover supermassive black hole that now faces Earth by Bcap2219

I mean, a GRB would wipe us all out… but it’ll take some time to get here thankfully… but knowing this decade I’m optimistic it’ll happen this year.

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DeeHawk t1_jdv9ly0 wrote

If you're looking directly into the eye of the black hole now, it means that was the position 657 million years ago. Gamma-ray speed is the same as visible light, which mean they arrive at the same time.

However, GRB's spread out over 2°-20°, severely reducing its effect over distance.

Which means it has to be pretty close to do any damage. (It would have to be in our part of the Milkyway.)

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