Re: accruate "sundials"



jtaylor wrote:
> <geraldkelleher@xxxxxxxxxxx> wrote in message
> news:1118509791.790356.139920@xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx
> > To JTaylor
> >
> > The Earth's independent axial rotation is a single event hence there is
> > only one value corresponding to that rotation through 360 degrees - 24
> > hours exactly.
> >
>
> But why does it _have_ to be 24 hours?
>

> Surely if we measured time in hitrops, and there were 41.3324 hitrops in a
> day, it would be the same length. Why does it matter what we call the units
> of time, or how big they are?

The Earth's axial rotation through 360 degrees is a single event
because it is an independent motion,as you are rotatintg with that
rotation (which generates terms such as dawn,noon and dusk) you have no
choice in the matter is assigning two values for that rotation through
360 degrees.

You are thinking like a Newtonian/relativist (technically the concepts
are astronomically worse than geocentricity) and not at all like an
astronomer for it should take only a few posting to become familiar
with the pre-Copernican Equation of Time principles which isolate
axial rotation to a single value and as an independent motion within a
Copernican/Keplerian framework.

Again,most of humanity already knows that there is only one value for
axial rotation at 15 degrees per hour and 24 in total for a full
revolution of the Earth on its axis but cataloguers and mathematical
theorists,following a Flamsteed/Newtonian lead,try to justify two
values for axial rotation 9one to the Sun,the other to the distant
stars) through 360 degrees and designate 23 hours 56 min 04 sec as the
'actual' value.

Whatever cartoon units you care to make up,the Equation of Time
principles which fix the pace of equable hours,minutes and seconds and
like it to axial rotation would remain unchanged.If you are not capable
of figuring out the translation from the pre-Copernican equable 24 hour
day and the translation into the heliocentric constant and independent
axial motion,and this is extremely easy with familiarity,then you are
welcome to Newtonian framehopping which mangled the relationship
between axial and orbital motion by giving yourselves choices you do
not have.

.

Relevant Pages

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