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Old November 2nd 10, 11:23 AM posted to sci.physics.relativity,sci.physics,sci.astro,sci.astro.amateur
oriel36[_2_]
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Default TWIN PARADOX OR TWIN ABSURDITY?

On Nov 1, 9:52*pm, "Paul B. Andersen" wrote:

Quite.
You swing a lot, but never hits. :-)


Mathematicians seemingly can't,are not capable of or do not want to
put Isaac's idiosyncratic version on the averaging process for the 24
hour day in context insofar as what must appear to you as definitions
of two separate 'time' things is simply a standard procedure
separating the progression of unequal days as referenced to natural
noon from the steady progression of 24 hour days which make up the
steady progression of days in the calendar system -

"Absolute time, in astronomy, is distinguished from relative, by the
equation or correlation of the vulgar time. For the natural days are
truly unequal, though they are commonly considered as equal and used
for a measure of time; astronomers correct this inequality for their
more accurate deducing of the celestial motions." Newton

The detailed and accurate version is Huygens,no absolute/relative
definitions but a simple correspondence that people in
sci.astro.amateur must know backwards and forwards by now -

"Here take notice, that the Sun or the Earth passeth the 12. Signes,
or makes an entire revolution in the Ecliptick in 365 days, 5 hours 49
min. or there about, and that those days, reckon'd from noon to noon,
are of different lenghts; as is known to all that are vers'd in
Astronomy." Huygens

http://www.xs4all.nl/~adcs/Huygens/06/kort-E.html

It is something to watch people try to discuss nothing for over 100
years and as long as relativity has been around,as far as Newton
goes,he did what he needed to do to project the idea that he
understood astronomical procedures and methods while putting his
readers in a state of unease by loading his 'definition' with things
like 'vulgar time'.What looks trivial to mathematicians is fundamental
to astronomers so that the entire episode of relativity is more or
less a statement about the standard of astronomy rather than any
perceived validity to that exotic indulgence.