Re: Truly Offensive Bad Astronomy

On Sep 4, 1:20 pm, Quadibloc <jsav...@xxxxxxxxx> wrote:
oriel36 wrote:
The Equation of Time represents the only time leap seconds apply to
the axial cycle and then only as a principle to keep clocks in sync
with the axial cycle at 24 hours/360 degrees.You probably heard
something about this vaguely through Dava Sobel's book on Longitude -

Rather than have leap seconds due to the Equation of Time, we are
content to let our clocks on an annual basis go up to 15 minutes out
of sync with the sundial.


There is now little point in openly lamenting the total carelessness
with which this most important subject is being treated and especially
with the treatise of Huygens before you all showing how clocks are
kept in sync with the axial cycle and from there to the existing
correlation between 4 minutes of clock time and 1 degree of
geographical seperation -

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

Maybe people take the 24 hour day so much for granted that they no
longer know nor care how Monday keeps elasping into Tuesday and so on
but it is not taught in schools nor is it promoted in astronomical
circles even though there is nothing difficult is seeing how the human
devised 24 hour cycle is kept pinned to the natural noon cycle via the
daily 'leap' correction commonly known as the Equation of Time.

Do any of you feel proud of the fiction which creates a difference
between a 24 hour day and a 23 hours 56 minute 04 second day just to
satisfy a late 17th century agenda which ultimately views retrogrades
and resolves them in an incorrect manner,a manner which is contrary to
the commentaries of Copernicus,Kepler and Galileo ?.






But we chose to base the length of the second on an average measure of
the 24 hour cycle over a period of years that ranged from 1750 to
1892, by comparing the solar cycle to the movements of the planets.
This was the basis, from the researches of Simon Newcomb, which led to
the scale of Ephemeris Time.

The tides require the expenditure of energy to lift up all that water
periodically. And so they lead to both the revolution of the Moon
around the Earth, and to the rotation of the Earth, slowing down -
because the Moon and the Earth are physical bodies, following the same
laws of motion as seen upon Earth.

So the day now is very slightly longer, adding up to about one second
a year, than it was about 180 years ago. But we must keep the length
of the second fixed, or we would lose the standard for the sizes of
our coils, resistors, and capacitors, among other things. There is no
pretentiousness in this; our measurements of things are genuinely able
to be this precise.

John Savard

Most people will enjoy the great system our timekeeping ancestors put
in place where the 86 400 seconds of Monday will turn into the 86 400
seconds of Tuesday,they will even enjoy the complimentary calendrical
system with its added 86 400 day leap correction which keeps the
impression of a linear progression of years using a 1461 day cycle by
resetting the celestial sphere cycle back to the annual cycle
calculated as 365 days 5 hours 49 minutes.

The word 'heartbreaking' is not normally associated with astronomy but
to see the devastation visited on the timekeeping and structural
astronomers by less careful people can be just that and I do mean
heartbreaking.The flexibility which the 24 hour system allows in
regards to setting geographical time zones ,daylight savings
time ,determining the completeion of an annual orbit as fractions of
the 24 hour day and all civil purposes should not detract from the
core principle which links natural noon with 24 hour clock noon.It is
never the axial rotation of the Earth,it is the transfer of the
average 24 hour day to the axial cycle as though it were 'constant'
that remains one of the greatest and most misunderstood astronomical
principles known.

What exactly do you wish to teach children ?,that axial rotation
occurs as an average of 23 hours 56 minutes 04 seconds and minute
fractions and this is a gauge for the axial and orbital motions of the
Earth -

http://upload.wikimedia.org/wikipedia/commons/1/1d/Tiempo_sid%C3%A9reo.en.png

As an aside,there is a nuisance who borrows the e-mail addresses of
people and sends messages to other groups in some self-serving quest
with no real purpose behind it ,the same principle Newton adopted when
he took genuine astronomical insights and stiched them together in an
idiosyncratic way for his own purposes.If anyone here feels disgust
that a person can wreck havoc with a newsgroup or with the once noble
discipline of timekeeping and structural astronomy then you may get an
inkling of what I feel.











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Relevant Pages

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  • Re: The Ethos is Coming!
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  • Re: Avoiding the Leap Second
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  • Re: Longitude/Latitude of the Great Voyages Paths over the Globe
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  • Re: Simple question about relativity and space time
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