--------
In message <c6361893-5df5-44b5-ad1a-5606a28bb...@noao.edu>, Rob Seaman writes:

>And length of day most assuredly derives from the synodic day,
>i.e., mean solar time.  Is there not one fewer day in the year than
>sidereal rotations?

"Derives from" is not a "physical reality", it's merely a social custom.


-- 
Poul-Henning Kamp       | UNIX since Zilog Zeus 3.20
p...@freebsd.org         | TCP/IP since RFC 956
FreeBSD committer       | BSD since 4.3-tahoe    
Never attribute to malice what can adequately be explained by incompetence.
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