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Originally Posted by StickyGreen
Well if something was coming towards Earth, I think the actual object would be moving slower than the light of the object...so we would see it coming before it hit us...
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Well, its not visible objects that is the concern, but the radiation energy released, which also travel the speed of light. The bigger or closer the supernova is, the more energy will hit us.
But look at the bright side; we will be killed instantly and never know what hit us
