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Interstellar travel is perfectly possible if you're not in a hurry.

Interstellar travel is perfectly possible if you're not in a hurry. Assuming there's no way to sidestep GR, the real problem is the human lifespan (and attention span.) If our culture moved at 0.1% of the current rate and we lived a thousand times as long, a 1400 year round trip wouldn't be problematic. It's possible to imagine low-energy lifeforms that move that slowly. But they wouldn't be looking for Earth-like planets to colonise - they'd be looking for much colder and more stable locations. And we wouldn't be looking for the right spectroscopic signals to give them away, because we don't know what they are.

Posted by TheOtherHobbes on Jul 23, 2015, 5:24 PM

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Interstellar travel is perfectly possible if you're not in a hurry.

TheOtherHobbesJul 23, 2015, 5:24 PM

Interstellar travel is perfectly possible if you're not in a hurry. Assuming there's no way to sidestep GR, the real problem is the human lifespan (and attention span.) If our culture moved at 0.1% of the current rate and we lived a thousand times as long, a 1400 year round trip wouldn't be problematic. It's possible to imagine low-energy lifeforms that move that slowly. But they wouldn't be looking for Earth-like planets to colonise - they'd be looking for much colder and more stable locations. And we wouldn't be looking for the right spectroscopic signals to give them away, because we don't know what they are.

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