[geocentrism] Re: For Robert Bennett and stella parallax
- From: "philip madsen" <pma15027@xxxxxxxxxxxxxx>
- To: "geocentrism list" <geocentrism@xxxxxxxxxxxxx>
- Date: Sat, 5 Apr 2008 11:49:03 +1000
Marc they was not my drawings. Cant remember being ever upset by you. And I
never get upset..but for very fleeting anger. Thedrawing is / are allegedly
from Rob Bennett. I had a problem with them as well but that is just my
limited capacity to read them.. And no, I still aint got it.
As you showed, the earths orbit around the sun creates an illusion you refer
to, "So while in a year time the Sun orbits approximately 365¼ times around the
Earth, the stars orbits approximately 366¼ times." or more precisely the stars
orbit the earth faster than the sun ..
I admit that I have some confusion about these times.. So I set to get some
definitions which I thought interesting enough to share..
Sidereal time is a measure of the position of the Earth in its rotation around
its axis, or time measured by the apparent diurnal motion of the vernal
equinox, which is very close to, but not identical to, the motion of stars.
They differ by the precession of the vernal equinox in right ascension relative
to the stars. Earth's sidereal day also differs from its rotation period
relative to the background stars by the amount of precession in right ascension
during one day (8.4 ms).[1] Its J2000 mean value is 23h56m4.090530833s.[2]
So then what is diurnal motion?
Diurnal motion is an astronomical term referring to the apparent daily motion
of stars around the Earth, or more precisely around the two celestial poles. It
is caused by the Earth's rotation on its axis, so every star apparently moves
on a circle, that is called the diurnal circle. The time for one complete
rotation is 23 hours, 56 minutes and 4.09 seconds (1 sidereal day).
AAH! So far so good. Its caused by the earths rotation, but we havn't been
told what that is exactly yet. But first vernal equinox .. They said sidereal
time was one rotation of the vernal equinox.. this is where its complicated...
In astronomy, equinox can have two meanings: Doesn't that just grab ya!
a.. The event that the Sun is positioned directly over the Earth's equator
and, by extension, the apparent position of the Sun at that moment, or the time
that it happens.
b.. The time at which the vernal point, celestial equator, and other such
elements are taken to be used in the definition of a celestial coordinate
system—see Equinox (celestial coordinates) Not now thank you!
An equinox in astronomy is that moment in time (not a whole day) when the
centre of the Sun can be observed to be directly above the Earth's equator,
occurring around March 20 and September 23 each year. Thats better, but
"around" those dates hmmm
More technically, at an equinox, the Sun is at one of two opposite points on
the celestial sphere where the celestial equator (i.e. declination 0) and
ecliptic intersect. These points of intersection are called equinoctial
points—the vernal point and the autumnal point. By extension, the term equinox
may be used to denote an equinoctial point.
There is either an equinox (autumn and spring) or a solstice (summer and
winter) on approximately the 21st day of the last month of every quarter of the
calendar year. On a day which has an equinox, the centre of the Sun will spend
a nearly equal amount of time above and below the horizon at every location on
Earth and night and day will be of nearly the same length. The word equinox
derives from the Latin words aequus (equal) and nox (night).
So I'm going back to this from all above as the best definition of a sidereal
day.
Diurnal motion is an astronomical term referring to the apparent daily motion
of stars around the Earth, or more precisely around the two celestial poles. It
is caused by the Earth's rotation on its axis, so every star apparently moves
on a circle, that is called the diurnal circle. The time for one complete
rotation is 23 hours, 56 minutes and 4.09 seconds (1 sidereal day).
I'm not yet clear on just how long one rotation of the earth is as yet. The
above implies that the world has made one rotation in a sidereal day, but it
was not said .
Perhaps this segment might help. And it sure does... Though this is a worry?
"Earth's sidereal day also differs from its rotation period relative to the
background stars by the amount of precession in right ascension during one day
(8.4 ms).[1] Its J2000 mean value is 23h56m4.090530833s.[2] perhaps not LOL.
Sidereal time and solar time.
Solar time is measured by the apparent diurnal motion of the sun, and local
noon in solar time is defined as the moment when the sun is at its highest
point in the sky (exactly due south or north depending on the observer's
latitude and the season). The average time taken for the sun to return to its
highest point is 24 hours.
During the time needed by the Earth to complete a rotation around its axis (a
sidereal day), the Earth moves a short distance (around 1°) along its orbit
around the sun. Therefore, after a sidereal day, the Earth still needs to
rotate a small extra angular distance before the sun reaches its highest point.
A solar day is, therefore, around 4 minutes longer than a sidereal day.
The stars, however, are so far away that the Earth's movement along its orbit
makes a generally negligible difference to their apparent direction (see,
however, parallax), and so they return to their highest point in a sidereal
day. A sidereal day is around 4 minutes shorter than a mean solar day.
Another way to see this difference is to notice that, relative to the stars,
the Sun appears to move around the Earth once per year. Therefore, there is one
less solar day per year than there are sidereal days. This makes a sidereal day
a factor of approximately 365.25⁄366.25 shorter than the 24-hour solar day,
giving approximately 23 hours, 56 minutes, 4.1 seconds (86,164.1 seconds).
I got it !! I got It!! So the earth actually rotates one and a bit rotations
per day... And I always thought it made one revolution per day... I can chalk
up one more point against my kindergarten teacher.
And a picture to finish off.. but I will be back having gotten myself updated
on this subject ..re the aether..
Sidereal time vs solar time. Above left: a distant star (the small red circle)
and the Sun are at culmination, on the local meridian. Centre: only the distant
star is at culmination (a mean sidereal day). Right: few minutes later the Sun
is on the local meridian again. A solar day is complete.
Philip
----- Original Message -----
From: marc-veilleux@xxxxxxxxxxxx
To: Geocentric
Sent: Saturday, April 05, 2008 8:08 AM
Subject: [geocentrism] Re: For Robert Bennett and stella parallax
Hello Philip M.,
I don't mean to upset you again, but both your drawings seems to be totally
unreal, but more particularly the geocentric model which seems to put the
observer at the center of the Earth.
But in both visions, at 6 months interval (apart), the observed star above
the meridian of the observer should be at approximately 180 degrees apart.
This is because in the HC model the Earth has 2 different and simultaneously
motions: daily and yearly which would cause the same star to be observed above
the same meridian (if it were possible to observe the same star from above the
same meridian) at 180 degrees apart, 6 months apart. The same apply in the GC
model, because the stars are orbiting faster than the Sun around the Earth. So
while in a year time the Sun orbits approximately 365¼ times around the Earth,
the stars orbits approximately 366¼ times.
Perhaps the parallax could be explained because they can only be observed
from a different angle and/or from a different location of the observer.
You got it ?
Marc Veilleux
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