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Previous comments... You are currently on page 3.
If FTL travel and the ansible are possible, people will be living sci-fi dreams of an interstellar republic.
Author?
Not exactly what most people think of when discussing a spacecraft, and it depends on tech that has not yet been invented or proven.
Thanks for the info, DrZ. Clearly shows that there are some exploration plans afoot.
http://www.space.com/32546-interstell...
(http://ntrs.nasa.gov/search.jsp?R=198...) I am C. Ivie
The Centauri system was one of our study samples. It is a trinary star system consisting of Alpha Centauri A and B as well as Proxima Centauri. It lies about 4.3 light years away from our solar system and planets have been detected around all three stars.
In our initial studies we realized that propulsion presented a major engineering challenge. We initially considered a high specific impulse ion drive powered by a 10 megawatt breeder reactor. That design could reach a peak velocity of abut 3 percent of the speed of light or 9,000 kilometers per second after about ten years of constant acceleration. If a flyby was intended there would be no need to slow down at the destination so the mission could only make a series of observations of the three star systems.
Subsequent studies included a positron annihilation antimatter reactor which could achieve peak velocities of about 15 percent of light speed. With this system mission times on the order of 60 years became feasible.
Now there is a new concept promoted in part by Stephen Hawking that involves laser powered light sails. In principal this system can achieve velocities approaching 70 percent of light speed in just a few days. So far, none of the studies have identified any fundamental showstoppers but the engineering challenges are enormous. It is conceivable that unmanned exploratory probe missions could be launched toward several of the nearer stars within 10 years. Right now interstellar missions are in the same place as interplanetary missions were in the late 1950's. Now we have sent probes to all of the major planets in the Solar system and have landed on several of them. A powerful influence will be the participation of private companies in the development of the technologies necessary.for truly ambitious and advanced missions. There are a number of companies that are seriously studying asteroid mining which could become a multi trillion dollar enterprise within the next ten to twenty years. I am consulting for one of these. I was involved in the first American artificial satellite, explorer one, and several of the lunar and planetary missions that have flown since. Technology and capability have advanced much more rapidly than any of us could have anticipated in the 60's and 70's. Very exciting stuff.
But whatever the case, there some serious flaws in the whole astral projection thought anyhow.
It is now believed that gravity waves travel at about 800 times the speed of light and that the use of gravity is truly free energy that will change the way we live forever. It will be most interesting to find out what the God particle is actually capable of. The folks in Cern probably have an inkling!
Galt's Barsoom, baby! ;)
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