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"[...] the team estimates it would take 20 years and $60 billion - which may sound like a lot, but when you consider it took almost three times that much to get the space shuttle off the ground, it's a steal. And once it's built, it would only cost $50 per kilogram to send things into orbit, compared to the current rates of $10,000 per kilogram for cargo and $100,000 per kilogram for people."
Startram.com
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