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elenearielRight now I am reading a book called Mapping Time which is mostly about calenders and clocks and other time-keeping methods throughout history. It contains such sentences as
Almost.
The lunation refers to the mean synodic period of the moon, and the year to the mean tropical year; both show small secular changes. The day shows a variation in the course of a year of about 50 seconds and also a small secular change.and
It is relevant to note that one second of time is about 0.000012 days.It is endlessly facinating, and now I almost understand Universal Time and the corrected versions UT1 and UT2 and International Atomic Time and Co-ordinated Universal Time and Greenwich Mean Time.
Almost.
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Date: 2009-02-09 01:24 am (UTC)no subject
Date: 2009-02-09 02:32 am (UTC)no subject
Date: 2009-02-09 02:33 am (UTC)