Originally posted by Josh
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Getting back to the original topic, it seems to me most any ship capable of a trip duration that we would consider survivable time frame would basically be a weapon. Even accelerating a modest mass, say 1000-3000 tons, at 0.01g consistently would add about 1%c per year and give you impact measured in gigatons at the arrival point in only a half dozen light years. A probe specifically designed to gravity assist rather than slow down so as to investigate multiple star systems would be indistinguishable from a weapon designed to devastate a biosphere.
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