# [FairfieldLife] Re: Finding True East

--- In FairfieldLife@yahoogroups.com, gullible fool <[EMAIL PROTECTED]> wrote:
>
>
> > It will be for quite some time. It won't be in 13000
> > years.
>
> How's 8000 years? Is that enough proof? Link to here
> and change "maximum year" to 9999 and "yearly
> increment" to 100 and you will find that the vernal
> equinox in 9900 will be on March 21st.
>
> http://aom.giss.nasa.gov/srvernal.html

Um, not really. My reading of the very first line of the site is that
March 21 as vernal equinox is a fixed input, a core assumption of the
model. Thats fine for 100-200 year spans, which is what I suspect the
model is used for. Its not fine for 13000 years out.

"For the six Atmosphere-Ocean Model simulations (C089, C090, C091,
C092, C093, C094) used by this current web site, all years have
exactly 365 days and vernal equinox always occurs on March 21, hour 0."

> > You are confusing precession with
> > nutation
>
> I have been an astronomy buff for 38 years and am not
> confused easily. I leave it to those who know little
> about the subject to be confused.

Ok fine. So asking a second time, as a learned bright guy with 38 year
experience in astronomy,  how exactly do you define precession of the
equinox?

I define it as follows:

> > "Precesion of the equinox" means that the position
> > of the sun at the
> > vernal equinox, relative to the constallations,
> > "retreats" one degree
> > every 72 years, making a full cycle around the
> > zodiac of 12
> > constellations every 26000 years. Vernal equinox
> > occurs once a year
> > when day and night lengths are equal and when the
> > sun rises at true east.

What parts of my definition do you disagree with?

> --- doctor_gabby_savy <[EMAIL PROTECTED]>
> wrote:
>
> > --- In FairfieldLife@yahoogroups.com, gullible fool
> > <[EMAIL PROTECTED]> wrote:
> > >
> > >
> > > > Well I will bet you a quart of soma that in
> > 13000
> > > > years the vernal
> > > > equinox will be in "September".  Lets meet then
> > and
> > > > see.
> > >
> > > No. The sun moves from its lowest point in the sky
> > > relative to the earth to its highest point in the
> > sky
> > > relative to the earth in six months, from the
> > winter
> > > solstice day to the summer solstice day. Half-way
> > > through the six months, the sun crosses the
> > mid-point
> > > (celestial equator) on its journey northward and
> > that
> > > crossing of the mid-point is what the vernal
> > equinox
> > > is. The vernal equinox will always be in March in
> > the
> > > northern hemisphere and in September in the
> > southern
> > > hemisphere.
> >
> > It will be for quite some time. It won't be in 13000
> > years.
> >
> > > That won't change because of the earth's
> > > minor wobbling.
> >
> >
> > The 26000 year cycle of the precession of equinox
> > can hardly be termed
> >  minor wobbling. You are confusing precession with
> > nutation. How
> > exactly do you define precession of the equinox?
> >
> > I define it as follows:
> >
> > "Precesion of the equinox" means that the position
> > of the sun at the
> > vernal equinox, relative to the constallations,
> > "retreats" one degree
> > every 72 years, making a full cycle around the
> > zodiac of 12
> > constellations every 26000 years. Vernal equinox
> > occurs once a year
> > when day and night lengths are equal and when the
> > sun rises at true east.
> >
> >
> >
> >
> >
> >
> >
> >
> >
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