On Jan 24, 11:13*am, Buchan Meteo wrote:
Gavino scrive:

"Buchan Meteo" wrote in message
...
The earth rotates once each day, 365 times in 365 days, and 366 times
in 366 days when we add a leap day to the calendar year (not to be
confused with a real year).

No, this is what oriel36 asserts himself and is incorrect. (He actually
has no problem understanding the leap year cycle, quoting ad nauseam
from the ancent Egyptians and other historic sources on the topic.)

OED
day n. ...corresponding to a rotation of the earth on its axis.

The earth rotates once each day *relative to the sun*

The earth rotates once each day on its axis. That is the definition of a
day. Thus it rotates once per day, or a million times in a million days
because one rotation *is* one day.

--
Gianna
Peterhead, Scotland

buchan-meteo.org.uk

A few tips if you choose to continue sorting this out,daily rotation
exists as an independent motion from orbital motion so that the
primary reference is between these two motions rather than to any star
whether the external stars or the central Sun.The next reference is
natural noon as the combined effect of both daily rotation and orbital
motion combine to create a natural inequality in the length of time
from one noon to noon cycle.

How the variations in natural noon convert into the 1461 days of the
calendar system and the steady progression of 24 hour days and from
there how these equable/steady 24 hour days substitute for steady
rotation at a rate of 15 degrees per hour is a very,very complicated
issue yet the longitude problem and the creation of accurate watches
keeps the focus attached to the noon cycles and how days/years get
converted into rotations/orbital circuits.

Yesterday was a low point in the forum where some qualified
meteorologist could ear to match one rotation of the Earth with day
turning to night and daily temperature fluctuations as the 1465/1461
imbalance is a contrary perspective but some people must sense the
horror of losing that correspondence as it is the primary fact in any
weather related topic as the daily input has a rotational cause and
any influence after that such as irradiation of heat is a secondary
effect of rotation.

If there is a dispute over what causes the daily temperatures to rise
and fall,you can be certain that something is terribly wrong and good
luck to you in your endeavor.

oriel36 scrive:

A few tips if you choose to continue sorting this out,

Not me. I am entirely detached from this discussion.

--
Gianna
Peterhead, Scotland

buchan-meteo.org.uk

On Jan 24, 12:37*pm, Buchan Meteo wrote:
oriel36 scrive:

A *few tips if you choose to continue sorting this out,

Not me. I am entirely detached from this discussion.


Don't think so,when you have a meteorologist unable to affirm that
daily temperatures fluctuate in response to the daily rotation of the
Earth,that is quite something else.I doesn't matter to me whether
readers in this forum choose an imbalance of 1465 rotations in 1461
days which is tantamount to arguing cause and effect of daily
temperature fluctuations,the correct principles go somewhere else
where it will be dealt with properly.

Students do have a right to learn that the Earth turns once in 24
hours and 1461 times in 1461 days,it all depends on adults accepting
the true reference for rotation,in this case a proportion between
rotations and the number of times our planets makes a circuit of the
Sun,the ancients framed this as the 1461 days in 4 years and we still
inherit their system but ultimately there is a conversion between
days/years with rotations/orbital circuits that presently people
positively refuse to accept.

You are right,365 rotations in 365 days and 366 rotations in 366 days
with Feb 29th as both another day and another 24 hour rotation of the
Earth enclosed in a system of 1461 days as the Earth makes 4 circuits
around the Sun.



--
Gianna
Peterhead, Scotland

buchan-meteo.org.uk

"Buchan Meteo" wrote in message
...
Gavino scrive:
"Buchan Meteo" wrote in message
...
The earth rotates once each day, 365 times in 365 days, and 366 times
in 366 days when we add a leap day to the calendar year (not to be
confused with a real year).

No, this is what oriel36 asserts himself and is incorrect.

OED
day n. ...corresponding to a rotation of the earth on its axis.

The earth rotates once each day *relative to the sun*

The earth rotates once each day on its axis. That is the definition of a
day. Thus it rotates once per day, or a million times in a million days
because one rotation *is* one day.

Gianna, maybe you're being deliberately obtuse for a laugh (or just to be
awkward!), but please don't fall into oriel36's confusion.

Rotation can only be defined relative so some reference direction, so the
phrase "rotation of the earth on its axis" is imprecise.
The day of 24 hours that we are all familiar with is, as I said, the period
of rotation relative to the sun (actually the mean period, as it varies
throughout the year).

However, since the earth is also moving in orbit around the sun, it is more
logical (on physics grounds) to take the 'true' period of rotation to be
relative to the 'fixed stars'. This is about four minutes short of 24 hours,
as Ian Bingham explained - read his post again if this is not clear.
So in the course of its orbit around the sun in 365.25 days, the earth
actually rotates 366.25 times.

The Foucault pendulum is a good demonstration of this, but simple
observation of the stars (a given star or constellation rises 4 minutes
earlier each day) bears it out.

On Jan 24, 6:15*pm, "Gavino" wrote:

So in the course of its orbit around the sun in 365.25 days, the earth
actually rotates 366.25 times. (1465 rotations in 1461 days)

The calendar cycle which ends in a number of weeks with the 24 hours
of rotation that is February 29th,it is another day on this gorgeous
planet of ours and it ends the 4 circuits of the Earth that began on
March 1st 2008 with the first rotation.Here is one 24 hour day and one
rotation of the Earth within the greater cycle of the orbital motion
of the planet ,in this case May 29th 2008 -

http://www.youtube.com/watch?v=JxrIMHKobk0

You were going about your business that day as the temperature rose
as your location turned to the Sun and it got cooler as it turned into
the shadow/night.On that day people were born and died,while people
woke up to prepare for the upcoming summer,others went to sleep
getting ready for winter.Great things happened that day as with every
other day and 24 hours of rotation where one keeps in step with the
other and it is time we used all the benefits of technology such as
this time lapse footage to have a look at our own planet once more.

If you want 1465 rotations in 1461 days then turn your gaze away from
that planet and all the amazing history that occurred on its surface
from biological and geological evolution to the great battles nations
once fought,from the achievements of men who looked out from its
surface to the individual concerns for family and community.

When it happens that day turns to night within a 24 hour period,and
remaining that way through the 1461 days of the calendar cycle,you can
then look into the celestial arena from a rotating Earth as a
reasonable person and one who would not knowingly create an imbalance
between 24 hours of rotation and a day/night cycle.