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Note: I'm assuming all relevant space travel is close to earth (that is, there's no need to coordinate e.g. travel to Mars, as soon as it leaves the near-earth range). One point about space is tha...
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Note: I'm assuming all relevant space travel is close to earth (that is, there's no need to coordinate e.g. travel to Mars, as soon as it leaves the near-earth range). One point about space is tha...