"Cecil Moore" wrote in message
et...
Dave Oldridge wrote:
Cecil Moore wrote in news:aqfuh.4372$O02.4066
*Only* within the frame of reference where the second
was defined which didn't exist for the first 2/3
of the history of the universe.

Actually, the second is defined as a certain exact number of oscillations
of a cesium atom in the same reference frame as the observer.

The same problem still exists. The cesium atom didn't
exist before the first super nova. How can the time
be calculated between the Big Bang and the first super
nova if cesium didn't exist?
--
73, Cecil, http://www.qsl.net/w5dxp
Units of measurement are totally arbitrary, what they are measuring isnt. It
is irrelevant how long a second is as long as everyone agrees. Time has
nothing to do with the existance of cesium. The origonal basis for the
second was the roatation of the earth but that is not constant so it was
redefined I believe in the 60s, seems like I remember hearing about it in
HS.