[ntp:questions] A Suggestion For Abolishing the Leap Second

Danny Mayer mayer at ntp.isc.org
Thu Jun 7 13:35:55 UTC 2007


You *must* stop sending messages to the newsgroup that consist of
nothing but a quote from someone else. If you want to keep quotes send
them to yourself. This is *not* your personal message archive. Noone is
interested in what you think is important.

Danny

Quadibloc wrote:
> Rob van der Putten wrote:
>> Quadibloc wrote:
>>
>>> Yes, this is quite right. However, while the second is no longer
>>> defined in terms of a fraction of the tropical year in 1900, the
>>> Earth's rotation still factors in to this in a more subtle way.
>>>
>>> You see, the Earth is in *motion*. And the SI second is defined (in
>>> practice, within the framework of UTC) as so many vibrations of a
>>> cesium atom...*sitting on the Earth*. So what was being referred to in
>>> what you are quoting is _not_ time being defined in terms of the
>>> Earth's motion, instead of being atomic time (the poster works for
>>> NIST, and has authored several papers on the atomic time scale) but
>>> the fact that our current time scale doesn't include *relativistic
>>> corrections* for the Earth's motion.
>> I suppose one would have to apply a correction for the movement of the
>> solar system through the galaxy as well. And the movement of our galaxy
>> through the universe.



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