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the_fungible_man t1_je45u38 wrote

It depends entirely on how fast that something is moving toward the Earth. You only specified a distance, but not a speed.

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innertiaworld OP t1_je462cl wrote

Oh! Well I'm not sure how fast. I read this article that said a blackhole is facing us and apparently it's a blazer (I don't know what that means I'm knew to space stuff) and it says it was 657 million light years away and I was wondering, if it were to come towards us, how fast it would be, but since I don't know the speed then I'm not much help. Sorry.

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Icy-Conclusion-3500 t1_je46bqe wrote

Even if earth and the black hole were heading towards each other at the speed of light (can’t go any faster), it would take hundreds of millions of years to meet in the middle.

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innertiaworld OP t1_je46fib wrote

Oh, ok! Thank you for answering (and being patient with me for not knowing this stuff)!

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[deleted] t1_je46x7s wrote

At that distance, cosmic expansion may keep them from ever meeting, even if they kept coming at one another. Space is weird.

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OG-Bluntman t1_je47afo wrote

For perspective, any light from earth reaching it today would pre-date essentially all animal life in the history of the planet.

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