[geocentrism] Re: Dynamic equivalents.
- From: "Jack Lewis" <jandj.lewis@xxxxxxxxxxxxx>
- To: <geocentrism@xxxxxxxxxxxxx>
- Date: Thu, 12 Aug 2004 08:19:52 +0100
----- Original Message -----
From: "Alan Griffin" <ajg@xxxxxxxxxxxxx>
To: <geocentrism@xxxxxxxxxxxxx>
Sent: Wednesday, August 11, 2004 10:26 PM
Subject: [geocentrism] Re: Dynamic equivalents.
> On 11 Aug, Jack Lewis <jandj.lewis@xxxxxxxxxxxxx> wrote:
> > A The heliocentric model consists of a fixed Sun with a rotating
> > Earth orbiting it.
>
> No. The Earth and the sun both rotate about the common centre of
> gravity, which I would guess to be inside the sun
> > B The geocentric model consists of a rotating,
> > fixed Earth with the Sun orbiting it.
> If the earth is rotating the same way as the sun, the sun would
> remain stationary in the sky!
Snip the rest .
OK Alan let me re-phrase my statement although I'm quite sure you know
exactly what I mean! I'm trying to establish what, of the three, are
dynamically equivalent.
A The heliocentric model consists of a fixed Sun with a rotating Earth
(24 hours) orbiting it once a year, maybe about a common centre of gravity.
B The geocentric model consists of a rotating (24 hours), fixed Earth
with the Sun orbiting it. once a year, maybe about a common centre of
gravity.
.
C The geostatic model consists of a fixed, non-rotating Earth with the
Sun orbiting it once every 24 hours with no common centre of gravity.
A and B are dynamically equivalent but C is not equivalent to either of
them.
> > I will assume everyone agrees with this, if not please let me know.
Jack
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