Why only use the solar sail? Use the sail to get up to speed, then disengage it and switch over to using a Bussard ramjet. Use of the ramjet should provide ample power for guidance corrections using a vectored thrust system.
Of course, the article may be leaving out a point like using gravity boosts for the sail on its way out, in which case a thousand kilometers would be a very drastic course deviance.
Multi-tasking is not the same thing as multi-threading.
Attempts to define race through science haven't had an entirely positive press subsequent to the collapse of the Third Reich, but the Weird Science Department of the UK Government could well be skittering on that very patch of thin ice. Lord Triesman, the Prime minister's Special Envoy for Returns, this week said that work on the "scientific and technical identification of nationality" will be "an important tool" to be used for the return of illegal immigrants to their countries of origin.
The trouble with money is it costs too much!
