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Far_Assistant_4315 t1_j2brxe7 wrote

Reply to comment by Graoutchmeuh in [WP] Faster than light travel has been proven impossible, that's why humans are so surprised when aliens turn up. Not as surprised as the aliens on the generational ship who say the planet was void of life when they set off, following a missile they had sent to wipe out the dinosaurs. by Wrooof

Yeah, and also-

>Because that missile wiped out all life on this planet 165 million years ago.

and

>“So,” I started to say, “You’ve been traveling for…”
>
>Around 165 million years, give or take.

Why would they wait 165 million years to start traveling to Earth, (assuming the missile goes the same speed as the the ship) to colonize the place?

Maybe they wanted to let Earth "cool down" after a total extinction event, but I doubt that 165 million years is even enough.

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akeean t1_j2c17cs wrote

The missle accelerated faster to a fraction of c while the generational ship ramped it's speed up (and then down) slowly in comparison, since it was humungus in size?

That wouldn't make much of a difference over 65m years, since even at 1g acceleration you get to 10% of c in a few decades.

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