Re: Precession
From: Ralph Nesbitt (ralph-nesbitt_at_sbcglobal.net)
Date: 10/31/04
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Date: Sun, 31 Oct 2004 16:18:49 GMT
"Carsten Troelsgaard" <carsten.troelsgaard@mail.dk> wrote in message
news:4184fd7a$0$31142$edfadb0f@dread15.news.tele.dk...
>
> "don findlay" <don@tower.net.au> skrev i en meddelelse
> news:5f164087.0410301429.54ad1b2c@posting.google.com...
> > bobg@radix.net (Robert Grumbine) wrote in message
news:<cljl8g$a8r$1@news1.radix.net>...
> > > In article <417c330a$0$65542$edfadb0f@dread15.news.tele.dk>,
> > > Carsten Troelsgaard <carsten.troelsgaard@mail.dk> wrote:
> > > >
> > > [snip others, and rewrap Carsten's lines to ca. 70 characters,
> > > versus the alternating 70/30 he's got]
> > >
> > > >To be frank, I never gave 'black holes' or other astronomical
> > > >considerations much attention... except for handier problems like
> > > >precession. Precession seems to be 'within my reach' though my book
> > > >of physics says, that the Earth precesses a whole revolution in
> > > >26.000 years - I find it somewhat difficult to believe that the
> > > >Earth's spin-axis at part of this time is lying in the plane of the
> > > >Sun-Earth rotational plane and thus effectively give no intermediate
> > > >seasons through the year (or rather half a year day/night for pole
> > > >positions). I probably better get used to the idea - unless someone
> > > >can correct my physics. Intuitively this must have a measurable
effect
> > > >on global circulation and weatherpatterns. Having revealed my
ignorance
> > > >this way, I figure that I shouldn't apply for a job on calculations
> > > >of global warming.
> > >
> > > Stuart (Bigdakine) already addressed part of this.
> > >
> > > The torque calculations aren't that difficult to do. Just
> > > take the earth as an oblate spheroid with flattening of ca. 1/300.
> > > (It's a bit larger than that, but close enough for hand work.)
> > > You know the size and moment of inertia of the earth, then apply
> > > the torques for the 5 degree off-equatorial motion of the moon, and
> > > the 23.5 degrees offset between the earth's equator and its
> > > orbital plane around the sun. See also, for instance,
> > > Milankovitch's 1941 book on the ice ages, or recent (last
> > > 25 years series) papers by Andre Berger.
> > >
> > > The precession is indeed considered to affect climate, on its
> > > time scale. The precession alters the relation between the timing
> > > of perihelion and of northern hemisphere winter. Right now,
> > > NH winter (Dec 21) is near perihelion (Jan 3).
> >
> > Yeah, Carsten, ...look whose torquing, ... Bill and Ben, ..the two
> > gyrating- twisting, johnny-come-lately flowerpot men, ...the ones
> > intent on mussin' up my petunia patch, by denying the importance of
> > the Earth's rotation - sorry, ..the Earth's *variable* rotation
>
> No, noone are denying/defending the ability of the spinning Earth to leave
an imprint, but since you
> appear to be oblivious to the fact that you rest some argumentation on
it's presence, it's
> surpricing that you oppose a discussion of an achtual calculation of it.
You have neither delivered
> the calculation nor conveyed a belief that you even understand a
connection between spin and
> structure. It has nothing to do with an expanding earth, but if you want
to take it into account you
> could do the credability of your general idea a favour by presenting the
physics yourself or a
> reference to someone that can. I obviously missed it as a general and
accepted state of affairs.
>
Carsten: don findlay is well noted for his huffiness when questioned about
what he considers "minor details" that may/may not affect his "comic book
presentations". Many have asked him to present/explain a basis for his Earth
Expansion presentations. He strenuously avoids answering because he has no
factual basis to support his positions. When asked/much less challenged to
present supporting evidence/data, he responds with insulting childish rants.
Ralph Nesbitt
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