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The concept of the expansion of the universe is hard to get your head around. We describe the universe is infinitely large, and it is expending into itself. So, there is no outside, You can't leave the cosmos. If you could find the edge of the universe and exit through that edge, you would re-enter the universe from the other side. Edges of the universe are ...


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It sounds like what you're looking for in general is an SSTO (Single Stage To Orbit -- http://en.wikipedia.org/wiki/Single-stage-to-orbit -- meaning it doesn't drop off boosters on the way up) rocket with a high payload fraction ( http://en.wikipedia.org/wiki/Payload_fraction -- meaning most of the spacecraft isn't fuel and fuel tank). Unfortunately, ...


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The answer based on accepted physics is trivial: none. That's why they call it science FICTION. One can theoretically reduce the amount of propellant, but then the required power these ships would have to develop would go trough the roof. Keep in mind that a medium sized rocket develops on the order of 10GW of power for a few minutes during first stage burn ...



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