Re: [LEAPSECS] the tail wags the dog

From: Ed Davies <ls_at_EDAVIES.NILDRAM.CO.UK>
Date: Tue, 24 Jan 2006 15:06:31 +0000

James Maynard wrote:
> The problem is not that the SI second is not based on a natural
> phenonemon (it is), but that the periods of the various natural
> phenonema (rotations of the earth about its axis revolutions of the
> earth about the sun, revolutions of the moon around the earth, etc.) are
> both incommensurate and changing.

Not to mention the hyperfine wibbles of caesium-133.
Received on Tue Jan 24 2006 - 07:08:42 PST

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