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And they won't get there with chemical rockets from the 1960s
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And they won't get there with chemical rockets from the 1960s
Rich wrote:
http://edition.cnn.com/2006/TECH/spa...eut/index.html Wonder what amount of the rocket mass would be expended getting it up to speed... |
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And they won't get there with chemical rockets from the 1960s
Richard F.L.R.Snashall wrote:
Rich wrote: http://edition.cnn.com/2006/TECH/spa...eut/index.html Wonder what amount of the rocket mass would be expended getting it up to speed... Yes. I have to agree that if the human race manages to survive, cooped up on the one planet Earth, until such time as it can design a spacecraft using antimatter as its fuel, so as to reach Alpha Centauri in six years... then the urgency of expanding into space to ensure human survival is rather low. I agree with Dr. Hawking's basic sentiments, however: the survival of humanity _is_ in jeopardy as long as we remain on one planet, and that is a reason for establishing communities in space. However, in terms of meeting *this* need, we will have to make do with Mars colonies or O'Neill habitats. This is not to say that going to the stars isn't also a good thing to do when the time comes. But to have the *ability* to launch a venture on such a scale, we will first have had to have inhabited the Solar System! John Savard |
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And they won't get there with chemical rockets from the 1960s
Richard F.L.R.Snashall wrote: Rich wrote: http://edition.cnn.com/2006/TECH/spa...eut/index.html Wonder what amount of the rocket mass would be expended getting it up to speed... 4000 tons into orbit, no big deal for a REAL spacecraft and almost no mass expenditure. But you have to use the RIGHT design. http://en.wikipedia.org/wiki/Project..._propulsion%29 |
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