Re: Leap second and the Earth's rotation

What? The earth rotates? I thought it was flat.

There goes my new book, volumes 1 through 17, on the Flat Disc Earth,
spinning through space. Well, i guess I'll jsut have to change Earth to
UFO's and it'll be a blockbuster. Imagine all the people in Kansas that
will claim to have been abducted my my aliens in their flying discs.

My theory about what most people believe goes something line this:

Most people do not study science, math and consequently do not understand
these subjects. They do understand warm, fluffy fairy tales and are more
likely to believe a fairy tale than a valid scientific explanation, backed
up with facts, and scientific data.

But serriously, from a physics standpoint, are there any theories as to
causes the outer core of the earth (liquid Fe, Mn and other stuff) to spin,
thereby generating the earth's magnetic fields? I have seen experiments
that demonstrate spinning similar material in a lab environment have
generated magnetic fields. The centrifugal motion of the spinning planet,
perhaps? What else would it do.



"oriel36" <geraldkelleher@xxxxxxxxx> wrote in message
news:1135775094.140564.295780@xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx
> Everyone here owes our ancestors gratitude for creating the 24 hour
> clock system and especially how Western civilisation adapted the day to
> the axial rotation of the Earth at 15 degrees per hour.There remains a
> small group of people who deny the core principles (1) but a quick
> description of how the pre-Copernican equable 24 hour day was adapted
> by the early heliocentrists to axial rotation at 15 degrees per hour
> and 24 hours/360 degrees precisely should make next year a better year
> for the rest of the world who already know that the Earth turns once
> every 24 hours precisely.
>
> Before the discovery of the Earth's axial rotation and orbital motion
> our ancestors relied on the return of the Sun to the same position at
> noon to signal the passage of 1 day.Since antiquity it was known that
> each day cycle is never the same in respect to the total length of a
> day (2) so they devised a system whereby the variations over the total
> year (3).The equalisation method was the addition and subtraction of
> minutes and seconds to observed natural noon known simply as the
> Equation of Time.
>
> Not only did the Equation Time make the 24 hour day possible and allow
> the seamless transition from one equable 24 hour day to the next,it
> allowed that the calendar system could be constructed of equable 24
> hour days,using these days it was found that the stellar background
> returned to the same position every 4 years and 1 day (4). We still
> retain the reference to natural noon in terms of AM and PM even though
> most have forgot its significance to the Equation of Time,both the
> natural day and the 24 hour clock day.
>
> Before turning to the heliocentric adaption to the principle of axial
> rotation at 15 degrees per hour,it is crucial to keep the Equation of
> Time principles which strictly refer to the Sun and the Earth apart
> from the later calendar system which uses the stellar
> backround.Basically,the Equation of Time is a daily leap correction to
> keep the equable 24 hour day elapsing into the next 24 hour day while
> the calendar system which is a complimentary extension ,uses a leap
> correction once every 4 years to align the stellar background back to
> its 1461 day cycle (365.25 days * 4).
>
> The early heliocentrists,on recognising that the Earth had an
> independent rotation,retained the Equation of Time core principle which
> generates the equable day and applied it to the Earth's rotation on its
> axis.As the original 24 hour day is a human conception emerging out of
> the natural unequal day it is not difficult to adapt the principle to
> the independent axial rotation of the Earth but only after the
> Equation of Time is applied (5) .
>
> So,the basic transfer of the pre-Copernican day to the axial rotation
> of the Earth at 15 degrees per hour was managed through the common
> denominator of the Equation of Time where it remains to this day.While
> contemporaries imagine that the principles between clocks and axial
> rotation can be severed by way of the calendar system,genuine and
> intelligent people would be capable of preventing scientists from
> making fools of themselves by way of acknowledging the exquisite
> principles which straddle pre-Copernican and heliocentric astronomy.
>
> Without a more accurate view that emerges from this short description
> it will be impossible to model climate imbalances from seasonal norms
> that rely on an accurate astronomical relationship between axial and
> orbital motion over an annual orbit,a true annual orbit rather than the
> calendrical/celestial sphere based system.Ultimately is matching our
> understanding and adaption of the rich heritage of our ancestors that
> was rudely interrupted by celestial cataloguers who introduced an
> analemmatic fudge and destroyed the principles between axial rotation
> and the Sun reference and substituted a celestial sphere/calendrical
> system for other spurious purposes.
>
> Perhaps somebody else can relate the pre-Copernican transfer of the
> equable day to the principle of axial rotation at 24 hours/360 degrees
> beter than I can but anything is better than this -
>
> http://liftoff.msfc.nasa.gov/academy/rocket_sci/orbmech/period.html
>
>
>
>
>
>
>
> (1) http://hypertextbook.com/facts/1999/JennyChen.shtml
>
> (2) Total length of a day refers only to the cycle from noon to noon
> and is not to be confused with variations in seasonal changes in
> daylight/darkness sometimes the total length makes a natural day 24
> hours and 15 min or 23 hours and 45 min depending on where the Earth is
> in its orbit.
>
> (3) The relationship between the planet's axial rotation and orbital
> motion over the course of an annual orbit is considered seperate to the
> 4 year and 1 day calendrical cycle.Most people perish on the rocks of
> reworking the calendrical system back into the Earth's axial and
> orbital motions by introducing a third reference neccessary for the
> calendar system - the celestial sphere.The 24 hour clock system refers
> strictly to the Earth and the Sun,in its pre-Copernican or heliocentric
> formats.
>
> (4) The Equation of Time which facilitates the equable 24 hour day and
> by association the calendar system which contains a leap day correction
> is not just old,it is extremely old -
> http://www.livius.org/caa-can/caesar/caesar_t17.html
>
> (5) Allowing that many now recognise the accurate clocks of John
> Harrsion as resolving the determination of position using clocks,it
> takes just a small effort to appreceate that without the Equation of
> Time,neither clocks nor the superimposing of terrestial longitudes on
> the geometry and geography of the planet would be possible.
>
> "Harrison had built his first pendulum clock entirely of wood when he
> was twenty. He later published his "Equation of Time" tables 'enabling
> a clock user to rectify the difference between solar or true time as
> shown on a sundial to the more regular "mean time" as measured by a
> clock'."
>
> http://www.sailtexas.com/long.html
>


.

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