Hi there
jlevine wrote: <Cut> > Yes, this idea was proposed some time ago, and it is currently > being > pushed pretty hard by the folks who need to plan for going to Mars. > Some > version of this idea will probably be adopted if/when space travel > becomes > more common. However, the idea that the rotating geoid (which is the > basis for the current SI defintion) is the center of the universe will > not > be easy to overcome. I was at high school in the 70's. At that time the definition of a second wasn't linked to the earth's rotation at all. I still have a list of SI units somewhere, but I can't find find it right now. However, I remember it having something to do with caesium and a number of periods. I think this page uses a similar definition; http://www2.nict.go.jp/w/w114/next-generation/One-Second/One-Second-E.html BTW, the metre is defined in a similar way. <Cut> Regards, Rob -- Nothing is more surreal then reality _______________________________________________ questions mailing list [email protected] https://lists.ntp.isc.org/mailman/listinfo/questions
