From: dow on
On Sep 18, 3:26 pm, alien8er <alien8...(a)gmail.com> wrote:

> > Further evidence in favour of Mach's principle comes from cosmology.
> > If rotational motion is purely relative
>
>   It isn't. Look up "Foucalt pendulum".
>
>   Mark L. Fergerson

Gyroscopes are nicer.

Sure. These devices show that the earth is turning relative to some
*absolute* zero of rotation. But Mach suggested, and a lot of people
agree, that this zero is *defined by* the universe as a whole. The
universe is not rotating because that's the definition of "not
rotating". Somehow, and nobody is sure how, the universe as a whole
affects our local space so that a gyroscope will point at some given
distant galaxy regardless of the rotation of the earth beneath it.

If Mach was right, and the jury is still out on that, then in a sense
rotation *is relative*. It's relative to the universe as a whole. The
zero of rotation is embedded in the universe, and has been ever since
the Big Bang.

dow


From: oriel36 on
On Sep 18, 9:08 pm, alien8er <alien8...(a)gmail.com> wrote:
> On Sep 15, 12:58 pm, oriel36 <kelleher.ger...(a)gmail.com> wrote:
>
>
>
>
>
> > On Sep 15, 7:49 pm, alien8er <alien8...(a)gmail.com> wrote:
>
> > > On Sep 15, 3:32 am, oriel36 <kelleher.ger...(a)gmail.com> wrote:
>
> > > > On Sep 14, 11:06 pm, alien8er <alien8...(a)gmail.com> wrote:
>
> > > > > On Sep 14, 1:36 pm, dow <williamsdavi...(a)gmail.com> wrote:
>
> > > > > > >   The bottom line is that there's no fixed reference anywhere against
> > > > > > > which to measure the Earth's rotation period; it isn't even measurable
> > > > > > > against itself, though its absolute rotation _rate_ is measurable.
>
> > > > > > Ummm.. There is (or at least there is thought to be) an absolutely non-
> > > > > > rotating frame of reference, independent of observations of stars,
> > > > > > etc.. It's the frame in which there are no centrifugal or Coriolis
> > > > > > forces. Theoretically, the absolute speed of rotation of he earth is
> > > > > > its speed relative to this frame.
>
> > > > >   No, there's no such external reference.
>
> > > > >   Besides, I said its _period_ (length of a day) is not independently
> > > > > measurable.
>
> > > > Grow up for godness sake and think like a man.
>
> > >   You are an arrogant prick. You must be French.
>
> > >   You asked what you apparently assumed was a simple question (it
> > > wasn't) and I gave you the most honest answer I know. That evidently
> > > wasn't good enough to satisfy you. Too bad for you.
>
> > > > The Earth , as a sphere, will rotate at different speeds from a
> > > > maximum speed  at the Equator down to zero at the geographical
> > > > poles.The values for an observer at the Equator is 1669.8 km for every
> > > > 15 degrees of rotation covering the complete 40,075 km circumference
> > > > through 360 degrees,at 60 degrees latitude,the rotational speed is 837
> > > > km for every 15 degrees/1 hour and the same for all latitudes in the
> > > > table -
>
> > > >http://www.ncgia.ucsb.edu/education/curricula/giscc/units/u014/tables...
>
> > > > There is a cause and effect of different latitudinal speeds  which
> > > > would be fairly easy to acknowledge in an era of air travel where most
> > > > people are aware of the rapid transition  from daylight to darkness
> > > > the further towards the Equator and obversely,the longer twilights
> > > > experienced towards the geographical poles.At any given moment,a
> > > > location at the Equator is transiting at 1669.8 km per hour through
> > > > the circle of illumination generating a swift transition to darkness
> > > > while at 60 degrees latitude,the transition is longer due to the speed
> > > > of 837 km or 833 km less than the Equator speed.
>
> > >   Blah, blah, blah. Yes, I know all that.
>
> > Good !,that makes you my first attentive student now go teach the rest
> > what you just comprehended.
>
>   I didn't "just" comprehend it, I certainly am not your "student",
> and everyone else already knows it as well. I said as much when I
> described the three kinds of "day". Weren't you paying attention?
>

You don't realize that the latitudinal variations n twilight ,with the
most rapid transit from daylight to darkness happening at the
Equator,is the first formal proof of cause/effect due to daily
rotation through 360 degrees with the planet rotating at 1669.8 km per
hour at the Equator and an arbitrary 837 km per hour at latitude 60
degrees.Once you have cause and effect with the accompanying speeds
per hour you are now operating from the perspective of daily rotation
once in 24 hours and if you are not comfortable with the term
'student' then so be it,behave like a man and promote what is
essentially one of the easiest astronomical cause/terrestrial effect
that I can think of.


>   My point is that you cannot measure the Earth's rotation _period_
> without using an external reference, and THEY ALL MOVE.
>

Grow up all of you,it is not 100 years ago,the power of modern imaging
and humanity's ventures into space gets rid of that fusty 'fixed
stars' hoopla,we can look down on a rotating Earth and treat it like
with the magnificence it deserves -

http://www.youtube.com/watch?v=8Vmmv0gOfWw

Work with the Earth's daily rotation as it moves through the circle of
illumination and come up with the latitudinal variations in twilight
and you won't have to worry about insisting on external references,if
you have that far and comprehend the cause and effect you are already
working with definite latitudinal speeds from a maximum at the Equator
and diminishing to 0 at the poles.



> > > > A reasonable
> > > > person,and there are not many at the moment,accepts the cause and
> > > > effect with the values reflecting rotation through 360 degrees in 24
> > > > hours and then teaches their students or kids properly.
>
> > >   360 degrees _measured against what_? You _cannot_ measure the
> > > rotation of the Earth against itself only.
>
> > The transition from daylight to darkness
>
>   You cannot measure the rotation of the Earth against the sun because
> IT MOVES.
>

Who are you or anyone else to place limitations on interpretation,at
any given moment,a location at the Equator is turning through 1669.8
km for every 15 degrees of rotation and a full 40,075 km rotation
through 360 degrees and consequently in 24 hours.




> > >   You appear to be _assuming_ that the solar day is the only "proper"
> > > day. That's all very nice, but it varies through the year and is
> > > therefore a poor standard. It is also completely useless for aiming
> > > astronomical telescopes.
>
> > Grow up for goodness sake
>
> Don't just deliver vague attempts at insult, contradict me with facts,
> if you can.
>

Insults indeed !,you insult yourselves and it really takes no effort
from me,there is a chance one or two might wake up from this empirical
snoozing long enough to see Huygens or Harrison explain the technical
details contained in the 24 hour clock and its relationship to
planetary geometry organised around its rotational characteristics.

http://books.google.ie/books?id=8roAAAAAMAAJ&pg=PA89&dq=remarks#v=onepage&q=remarks&f=false

Page 90-91 explains it all from the person who come up with the
technology for the first accurate watches based on rotation in 24
hours.


>
>
>
>
> > > >>  Its _rate_ (or speed, if you prefer) _is_ independently
> > > > > measurable (say in a hermetically sealed room) with a Foucalt
> > > > > pendulum. Why a Foucalt pendulum doesn't exactly measure the length of
> > > > > a day is complicated and I won't try to explain; I'll refer you here
> > > > > instead:
>
> > > > >http://en.wikipedia.org/wiki/Foucault_pendulum
>
> > > > >   To say we've measured its period, its rotation must be timed against
> > > > > an _external_ measurement point, but they all _move_. That's why I put
> > > > > quotes around "fixed" stars.
>
> > > > What you do is quarantine the 'sidereal time' concept as it represents
> > > > a catastrophic lapse of reasoning which tries to force right ascension
> > > > into daily rotation as an independent motion.The values which explain
> > > > latitudinal variations in twilight or the transition through the
> > > > circle of illumination via daily rotational dynamics require definite
> > > > values which the 'sidereal time' junk cannot hope to supply insofar as
> > > > an observer at the Equator turns through a 40,075 km distance every 24
> > > > hours or 1669.8 km per hour or 111.32 km every 4 minutes .
>
> > >   You appear to have some bizarre fixation on Earthly measurements of
> > > time. That's all very nice for you, but there _are_ other people, with
> > > other interests on the planet. Some of them are astronomers, who need
> > > to be able to aim their telescopes properly.
>
> > I am considered a madman for promoting the rotation of the Earth once
> > in 24 hours or 15 degrees per hour
>
>   Measured against what, the sun? IT MOVES!
>
>   Also, the _rate_ of rotation of the Earth IS NOT constant; it varies
> over many time scales hence your claim is falsified.
>

Once you have an idea in your head and especially that 'sidereal time'
junk,it appears impossible for you to think otherwise.The 24 hour day/
calendar system was created in antiquity,the average 24 hour day
itself is an average cycle based on the natural noon reference,no more
or less.but the Equation of Time correction allows the 24 hour cycle
to represent an average of natural noons over the course of an annual
cycle thereby allowing you the facility of having the 24 hours of
Friday turn into the 24 hours of Saturday.Am I going to fast for you
or do you wish to take it further ?

As the annual cycle is represented by the return of a star to a
meridian in 365 days 5 hours 49 minutes as calculated using average 24
hour days,it allowed the ancients to create a linear progression of
years out of a raw daily and annual cycle where the fractional
difference of the equable day/calendar system gets corrected back to
the raw orbital cycle every Feb 29th of the fourth year.

Now,I know that the system would have had to come from the mind of a
single individual in antiquity and the references he worked with are
natural noon/Sun for the daily cycle and the stellar background for
the annual cycle and the calendar system whereas you lot have the
whole thing backwards.



>   You are indeed insane, right up there with the Einstein-haters.
>

You call me insane for promoting the sprawling history and technical
details behind rotation in 24 hours but you cannot give me a single
instance before Flamsteed which hitched daily rotation to the
background stars.



> > That is extremely
>
> > > difficult to do using only the solar day; there are a slew of
> > > correction factors that would need to be applied, and they change
> > > through the year. For that matter, they change with the centuries. The
> > > length of the solar day, the length of time it takes the Sun to
> > > reappear at a given maximum height above the horizon, increases with
> > > time. The day (all of them, actually) is getting longer and will
> > > continue to do so. GET USED TO IT.
>
> > You are arguing against planetary geometry/geography which states that
> > the  Equatorial Earth rotates through 1669.8 km every 15 degrees and
> > its entire  40,075 km circumference in 24 hours
>
>   You keep asserting that as if you have some evidence. What is it?
>

http://upload.wikimedia.org/wikipedia/commons/e/ee/World_globe.jpg

There you go,use the spine which connects the geographical poles as a
substitute for the circle of illumination and turn the globe 15
degrees and you will see it covers a geographical distance of 1669.8
km at the Equator and a full 40,075 km circumference through 360
degrees where 15 degrees represents 1 hour difference regardless of
latitude.


>
>
>
>
> > > > > > However, there is no existing way in which this speed can be measured
> > > > > > to more than a few digits of precision, so for practical purposes we
> > > > > > have to use the "fixed" stars, even though we know they are not really
> > > > > > fixed.
>
> > > > >   Horsefeathers.
>
> > > > Horsefeathers you say !,take off that late 17th century powdered wig
> > > > and start thinking like a man or be left behind.You do not need to be
> > > > too smart to appreciate how the planet ,as a sphere, rotates through
> > > > 360 degrees at different speeds with definite values for each
> > > > latitudinal location with definite effects following from basic
> > > > planetary facts of dimensions and rotational characteristics so drop
> > > > that nonsense of the 'fixed stars' and a really,really stupid
> > > > 'sidereal time' reasoning.
>
> > >   Yes, horsefeathers. There is NO non-moving external standard against
> > > which to measure the Earth's rotation period.
>
> > >   There is no way to measure the Earth's rotation period on the
> > > surface of the Earth, without using an external reference.
>
> > >   That's all there is to it. The solar day is as arbitrary as the
> > > others. They each have their uses and each is COMPLETELY INAPPROPRIATE
> > > for other uses.
>
> > >   Nobody cares about your idea of "smart" and "stupid", or what you
> > > think it means to be "a man". You have your fixation; enjoy it.
>
> > No,humanity has a holocaust
>
>   I suspect that word does not mean what you think it does.
>
> > which sees people who do not know their
> > limitations and enforce contrived speculative junk  on the wider
> > population under the guise of 'astronomy'.
>
>   What are you talking about? The "wider population" doesn't care
> about astronomy, it cares about filling its belly with cheap booze,
> and killing anyone who is (or might be) in any way different.
>
> > It is not an understatement
> > but rather an unfortunate fact that even the Earth's shape which is
> > contained in the  following set of geodetic values is lost so that we
> > literally exist,at least in matters relating to planetary
> > dynamics,structural astronomy and terrestrial effects at the level of
> > flat Earthers,this is no exaggeration for what people can wilfully
> > ignore common sense and all the history of
> > timekeeping,clocks,longitude and planetary geography/geometry.
>
> >http://www.ncgia.ucsb.edu/education/curricula/giscc/units/u014/tables...
>
>   You are very good at producing disjointed, rambling sentences. Did
> the foregoing have a point?
>
> > Now,remind me how long it takes the Earth to turn once.
>
>   I have already told you that there is no way to measure it except
> against moving external references, but you aren't really interested.
> You'd rather rant about some supposed vague conspiracy theory of
> yours.
>

As far as I am concerned it is a matter of too many intellectual
weaklings who cannot enjoy how the average 24 hour day gets transfered
to 'constant ' daily rotation as a convenience and I have less to say
about the stupidity which references daily rotation to the background
stars via the 'sidereal time' reasoning,if somebody wants a gold
badge or a clap on the back for appreciating the most basic planetary
facts of dimensions organised around the rotational characteristics of
24 hours then they are addressing the wrong person,the basic
principles are simple , enjoyable and part of my astronomical heritage
while yours is a useless wordplay .

What do you say to people who can't talk about the Earth's rotation
but are talking about 'universal rotation' for the logical conclusion
of 'sidereal time' and its fixed stars reference is the 'big bang'
nightmare,something which is terrifying in its dominance among people
who are not astronomers.





>   Mark L. Fergerson

From: alien8er on
On Sep 18, 2:24 pm, dow <williamsdavi...(a)gmail.com> wrote:
> On Sep 18, 3:26 pm, alien8er <alien8...(a)gmail.com> wrote:
>
> > > Further evidence in favour of Mach's principle comes from cosmology.
> > > If rotational motion is purely relative
>
> >   It isn't. Look up "Foucalt pendulum".
>
> >   Mark L. Fergerson
>
> Gyroscopes are nicer.
>
> Sure. These devices show that the earth is turning relative to some
> *absolute* zero of rotation. But Mach suggested, and a lot of people
> agree, that this zero is *defined by* the universe as a whole. The
> universe is not rotating because that's the definition of "not
> rotating". Somehow, and nobody is sure how, the universe as a whole
> affects our local space so that a gyroscope will point at some given
> distant galaxy regardless of the rotation of the earth beneath it.
>
> If Mach was right, and the jury is still out on that, then in a sense
> rotation *is relative*. It's relative to the universe as a whole. The
> zero of rotation is embedded in the universe, and has been ever since
> the Big Bang.
>
>                                        dow

From: alien8er on
On Sep 18, 2:24 pm, dow <williamsdavi...(a)gmail.com> wrote:
> On Sep 18, 3:26 pm, alien8er <alien8...(a)gmail.com> wrote:
>
> > > Further evidence in favour of Mach's principle comes from cosmology.
> > > If rotational motion is purely relative
>
> >   It isn't. Look up "Foucalt pendulum".
>
> Gyroscopes are nicer.

(sorry for the blank post; new trackball mouse is extra sensitive)

Whatever your preference. The Foucault pendulum is easier to track
IMO.

> Sure. These devices show that the earth is turning relative to some
> *absolute* zero of rotation. But Mach suggested, and a lot of people
> agree, that this zero is *defined by* the universe as a whole. The
> universe is not rotating

We don't know that either. It could be rotating _very_ slowly.

> because that's the definition of "not
> rotating". Somehow, and nobody is sure how, the universe as a whole
> affects our local space so that a gyroscope will point at some given
> distant galaxy regardless of the rotation of the earth beneath it.

This is a misstatement of a hypothesis put forward by Mach in an
attempt to avoid complete Relativity. There are others:

http://en.wikipedia.org/wiki/Mach_principle

It isn't even _Mach's_ principle; Einstein coined the term when he
was inventing General Relativity.

Mach himself didn't think there was necessarily any deep connection
between "matter there and inertia here", though Einstein was
convinced of it and considered the Lense-Thirring Effect to be proof
(despite the fact that the "effect" is mathematical, not
experimental).

> If Mach was right, and the jury is still out on that, then in a sense
> rotation *is relative*. It's relative to the universe as a whole. The
> zero of rotation is embedded in the universe, and has been ever since
> the Big Bang.

Bottom line, be careful what you claim as "observed fact".


Mark L. Fergerson
From: alien8er on
On Sep 18, 2:44 pm, oriel36 <kelleher.ger...(a)gmail.com> wrote:
> On Sep 18, 9:08 pm, alien8er <alien8...(a)gmail.com> wrote:
>
> > On Sep 15, 12:58 pm, oriel36 <kelleher.ger...(a)gmail.com> wrote:
>
> > > On Sep 15, 7:49 pm, alien8er <alien8...(a)gmail.com> wrote:
>
> > > > On Sep 15, 3:32 am, oriel36 <kelleher.ger...(a)gmail.com> wrote:
>
> > > > > On Sep 14, 11:06 pm, alien8er <alien8...(a)gmail.com> wrote:
>
> > > > > > On Sep 14, 1:36 pm, dow <williamsdavi...(a)gmail.com> wrote:
>
> > > > > > > >   The bottom line is that there's no fixed reference anywhere against
> > > > > > > > which to measure the Earth's rotation period; it isn't even measurable
> > > > > > > > against itself, though its absolute rotation _rate_ is measurable.
>
> > > > > > > Ummm.. There is (or at least there is thought to be) an absolutely non-
> > > > > > > rotating frame of reference, independent of observations of stars,
> > > > > > > etc.. It's the frame in which there are no centrifugal or Coriolis
> > > > > > > forces. Theoretically, the absolute speed of rotation of he earth is
> > > > > > > its speed relative to this frame.
>
> > > > > >   No, there's no such external reference.
>
> > > > > >   Besides, I said its _period_ (length of a day) is not independently
> > > > > > measurable.
>
> > > > > Grow up for godness sake and think like a man.
>
> > > >   You are an arrogant prick. You must be French.
>
> > > >   You asked what you apparently assumed was a simple question (it
> > > > wasn't) and I gave you the most honest answer I know. That evidently
> > > > wasn't good enough to satisfy you. Too bad for you.
>
> > > > > The Earth , as a sphere, will rotate at different speeds from a
> > > > > maximum speed  at the Equator down to zero at the geographical
> > > > > poles.The values for an observer at the Equator is 1669.8 km for every
> > > > > 15 degrees of rotation covering the complete 40,075 km circumference
> > > > > through 360 degrees,at 60 degrees latitude,the rotational speed is 837
> > > > > km for every 15 degrees/1 hour and the same for all latitudes in the
> > > > > table -
>
> > > > >http://www.ncgia.ucsb.edu/education/curricula/giscc/units/u014/tables...
>
> > > > > There is a cause and effect of different latitudinal speeds  which
> > > > > would be fairly easy to acknowledge in an era of air travel where most
> > > > > people are aware of the rapid transition  from daylight to darkness
> > > > > the further towards the Equator and obversely,the longer twilights
> > > > > experienced towards the geographical poles.At any given moment,a
> > > > > location at the Equator is transiting at 1669.8 km per hour through
> > > > > the circle of illumination generating a swift transition to darkness
> > > > > while at 60 degrees latitude,the transition is longer due to the speed
> > > > > of 837 km or 833 km less than the Equator speed.
>
> > > >   Blah, blah, blah. Yes, I know all that.
>
> > > Good !,that makes you my first attentive student now go teach the rest
> > > what you just comprehended.
>
> >   I didn't "just" comprehend it, I certainly am not your "student",
> > and everyone else already knows it as well. I said as much when I
> > described the three kinds of "day". Weren't you paying attention?
>
> You don't realize that the latitudinal variations n twilight

You refuse to realize that you are still timing the Earth's rotation
period against the Sun, and IT MOVES.

So, be a man, and admit there is no solid, unmoving reference
against which to measure the Earth's rotation period.

You cannot provide a method to INDEPENDENTLY measure the Earth's
rotation period.

> >   My point is that you cannot measure the Earth's rotation _period_
> > without using an external reference, and THEY ALL MOVE.

> Work with the Earth's daily rotation as it moves through the circle of
> illumination and come up with the latitudinal variations in twilight
> and you won't have to worry about insisting on external references

No "twilight" without using the external reference of the Sun.

You cannot provide a method to INDEPENDENTLY measure the Earth's
rotation period.

> > > > > A reasonable
> > > > > person,and there are not many at the moment,accepts the cause and
> > > > > effect with the values reflecting rotation through 360 degrees in 24
> > > > > hours and then teaches their students or kids properly.
>
> > > >   360 degrees _measured against what_? You _cannot_ measure the
> > > > rotation of the Earth against itself only.
>
> > > The transition from daylight to darkness
>
> >   You cannot measure the rotation of the Earth against the sun because
> > IT MOVES.
>
> Who are you or anyone else to place limitations on interpretation,at
> any given moment,a location at the Equator is turning through 1669.8
> km for every 15 degrees of rotation and a full 40,075 km rotation
> through 360 degrees and consequently in 24 hours.

How do you know that? You measure it against the Sun or some other
_external_ reference.

You cannot provide a method to INDEPENDENTLY measure the Earth's
rotation period.

> > > >   You appear to be _assuming_ that the solar day is the only "proper"
> > > > day. That's all very nice, but it varies through the year and is
> > > > therefore a poor standard. It is also completely useless for aiming
> > > > astronomical telescopes.
>
> > > Grow up for goodness sake
>
> > Don't just deliver vague attempts at insult, contradict me with facts,
> > if you can.
>
> Insults indeed !,you insult yourselves and it really takes no effort
> from me,there is a chance one or two might wake up from this empirical
> snoozing long enough to see Huygens or Harrison explain the technical
> details contained in the 24 hour clock and its relationship to
> planetary geometry organised around its rotational characteristics.
>
> http://books.google.ie/books?id=8roAAAAAMAAJ&pg=PA89&dq=remarks#v=one...
>
> Page 90-91 explains it all from the person who come up with the
> technology for the first accurate watches based on rotation in 24
> hours.

Not relevant.

You cannot provide a method to INDEPENDENTLY measure the Earth's
rotation period.

> > > I am considered a madman for promoting the rotation of the Earth once
> > > in 24 hours or 15 degrees per hour
>
> >   Measured against what, the sun? IT MOVES!
>
> >   Also, the _rate_ of rotation of the Earth IS NOT constant; it varies
> > over many time scales hence your claim is falsified.
>
> Once you have an idea in your head and especially that 'sidereal time
> junk,it appears impossible for you to think otherwise.

You are blinded by your obsession. You appear to have me confused
with someone who prefers the "sidereal" day as more "real" than any
other. I am not. You should have figured that out when you first
noticed that I put the word "sidereal" in quotes. That was apparently
too subtle for you, so I TOLD you that I put it in quotes because it
is ARBITRARY due to the fact that its reference point MOVES through
the sky.

Do you get it yet? I AM NOT A PROPONENT OF THE "SIDEREAL" DAY.

> The 24 hour day/
> calendar system was created in antiquity,the average 24 hour day
> itself is an average cycle based on the natural noon reference,no more
> or less.but the Equation of Time correction allows the 24 hour cycle
> to represent an average of natural noons over the course of an annual
> cycle thereby allowing you the facility of having the 24 hours of
> Friday turn into the 24 hours of Saturday.Am I going to fast for you
> or do you wish to take it further ?

I had all that a long time ago. My point is that the Solar day is as
ARBITRARY as the other two commonly used sorts of "day" because their
reference points MOVE. You seem to think the solar day is more "real".
It is not.

> >   You are indeed insane, right up there with the Einstein-haters.
>
> You call me insane for promoting the sprawling history and technical
> details behind rotation in 24 hours but you cannot give me a single
> instance before Flamsteed which hitched daily rotation to the
> background stars.

That. Is. Not. Relevant. To. My. Point.

You cannot provide a method to INDEPENDENTLY measure the Earth's
rotation period.

> > > You are arguing against planetary geometry/geography which states that
> > > the  Equatorial Earth rotates through 1669.8 km every 15 degrees and
> > > its entire  40,075 km circumference in 24 hours
>
> >   You keep asserting that as if you have some evidence. What is it?
>
> http://upload.wikimedia.org/wikipedia/commons/e/ee/World_globe.jpg
>
> There you go,use the spine which connects the geographical poles as a
> substitute for the circle of illumination and turn the globe 15
> degrees and you will see it covers a geographical distance of 1669.8
> km at the Equator and a full 40,075 km circumference through 360
> degrees where 15 degrees represents 1 hour difference regardless of
> latitude.

Not relevant. You are not demonstrating an independent method of
measuring the Earth's rotation period.

> > > > > > > However, there is no existing way in which this speed can be measured
> > > > > > > to more than a few digits of precision, so for practical purposes we
> > > > > > > have to use the "fixed" stars, even though we know they are not really
> > > > > > > fixed.
>
> > > > > >   Horsefeathers.
>
> > > > > Horsefeathers you say !,take off that late 17th century powdered wig
> > > > > and start thinking like a man or be left behind.You do not need to be
> > > > > too smart to appreciate how the planet ,as a sphere, rotates through
> > > > > 360 degrees at different speeds with definite values for each
> > > > > latitudinal location with definite effects following from basic
> > > > > planetary facts of dimensions and rotational characteristics so drop
> > > > > that nonsense of the 'fixed stars' and a really,really stupid
> > > > > 'sidereal time' reasoning.
>
> > > >   Yes, horsefeathers. There is NO non-moving external standard against
> > > > which to measure the Earth's rotation period.
>
> > > >   There is no way to measure the Earth's rotation period on the
> > > > surface of the Earth, without using an external reference.
>
> > > >   That's all there is to it. The solar day is as arbitrary as the
> > > > others. They each have their uses and each is COMPLETELY INAPPROPRIATE
> > > > for other uses.
>
> > > >   Nobody cares about your idea of "smart" and "stupid", or what you
> > > > think it means to be "a man". You have your fixation; enjoy it.
>
> > > No,humanity has a holocaust
>
> >   I suspect that word does not mean what you think it does.
>
> > > which sees people who do not know their
> > > limitations and enforce contrived speculative junk  on the wider
> > > population under the guise of 'astronomy'.
>
> >   What are you talking about? The "wider population" doesn't care
> > about astronomy, it cares about filling its belly with cheap booze,
> > and killing anyone who is (or might be) in any way different.
>
> > > It is not an understatement
> > > but rather an unfortunate fact that even the Earth's shape which is
> > > contained in the  following set of geodetic values is lost so that we
> > > literally exist,at least in matters relating to planetary
> > > dynamics,structural astronomy and terrestrial effects at the level of
> > > flat Earthers,this is no exaggeration for what people can wilfully
> > > ignore common sense and all the history of
> > > timekeeping,clocks,longitude and planetary geography/geometry.
>
> > >http://www.ncgia.ucsb.edu/education/curricula/giscc/units/u014/tables....
>
> >   You are very good at producing disjointed, rambling sentences. Did
> > the foregoing have a point?
>
> > > Now,remind me how long it takes the Earth to turn once.
>
> >   I have already told you that there is no way to measure it except
> > against moving external references, but you aren't really interested.
> > You'd rather rant about some supposed vague conspiracy theory of
> > yours.
>
> As far as I am concerned it is a matter of too many intellectual
> weaklings who cannot enjoy how the average 24 hour day gets transfered
> to 'constant ' daily rotation as a convenience and I have less to say
> about the stupidity which references daily rotation to the background
> stars via the 'sidereal time' reasoning,if somebody wants a  gold
> badge  or a clap on the back for appreciating the most basic planetary
> facts of dimensions organised around the rotational characteristics of
> 24 hours then they are addressing the wrong person,the basic
> principles are simple , enjoyable and part of my astronomical heritage
> while yours is a useless wordplay .

Wrong on so many levels.

I am not a proponent of so-called "sidereal" time.

You _still_ have not shown a way to _independently_ measure the
Earth's rotation period.

> What do you say to people who can't talk about the Earth's rotation
> but are talking about 'universal rotation' for the logical conclusion
> of 'sidereal time' and its fixed stars reference is the 'big bang'
> nightmare,something which is terrifying in its dominance among people
> who are not astronomers.

That's your obsession, not mine.


Mark L. Fergerson