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lukeprog comments on Stupid Questions December 2014 - Less Wrong
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Can anyone link a deep discussion, including energy and time requirements, issues with spaceship shielding from radiation and collisions, etc., that would be involved in interstellar travel? I ask because I am wondering whether this is substantially more difficult than we often imagine, and perhaps a bottleneck in the Drake Equation
A fair bit of this is either cited or calculated within "Eternity in six hours." See also my interview with one of its authors, and this review by Nick Beckstead.