http://ntrs.nasa.gov/search.jsp?R=20110023492
To infinity and beyond? Okay, so maybe just Neptune...
Quoteand enabling interstellar spaceflight by the end of the century
I can only hope I live long enough to see some prototypes of this....
If money were no object, given the current rate of technological advance we've been seeing over the last generation, I'd think we could see a prototype test within my lifetime(I'm 40 now, heh).... 8)