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Our closest star is 4.3 light years away. If we could fly 3 times faster than our current space probes, we'd get there in 430 years. Not good for a small crew, but maybe a generation ship.

And this is excluding the tremendous gains in propulsion technology we're bound to have in the next 100 years. Maybe not even faster-than-light technology, but even flying at 0.4c would give us great reach among the stars.

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