Comment on If we ever find a planet with life in it, we could never set foot on it, because the interaction of the two biologies can have unpredictable consequences

scytale@piefed.zip ⁨4⁩ ⁨months⁩ ago

• yobasari@feddit.org ⁨4⁩ ⁨months⁩ ago

  You don’t need FTL travel or multi-generational ships really. If you get close enough to the speed of light, time dilation can make the travel time for the people on the ship be as short as you want. Only for the people that stay on earth would the spaceship appear to take generations. Getting enough energy to reach such high speeds would be the difficult part as well as accelerating quickly without crushing the travellers.

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  • Thedogdrinkscoffee@lemmy.ca ⁨4⁩ ⁨months⁩ ago

    And presumably not vapourising from collisions with random particles in space while travelling at a significant fractions of C.

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• Xaphanos@lemmy.world ⁨4⁩ ⁨months⁩ ago

  FTL travel implies a mastery over spacetime itself. After that, a practical time machine is a matter of engineering details.

  We can be sure that we never get there because we are not flooded with tourists from the future. QED.

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  • JcbAzPx@lemmy.world ⁨4⁩ ⁨months⁩ ago

    That depends on the type of FTL we use. Some just require infinite energy or exotic particles to work. No mastery of spacetime needed.

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  • toynbee@lemmy.world ⁨4⁩ ⁨months⁩ ago

    As a kid, I once heard the theory that aliens are actually time travelers fucking with people.

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  • Tollana1234567@lemmy.today ⁨4⁩ ⁨months⁩ ago

    i wouldnt call it mastery, implies you can control spacetime as well, just finding ways around the speed of light limitations.

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  • Windex007@lemmy.world ⁨4⁩ ⁨months⁩ ago

    I love the hubris of this argument. It’s the identical construction of guys who say a woman must be a lesbian if they’re not into them.

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  • bluGill@fedia.io ⁨4⁩ ⁨months⁩ ago

    For that matter they have not sent travelers to us.

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