Re: The 3 minute 56 second illusion
- From: Morten Reistad <first@xxxxxxxxx>
- Date: Tue, 9 Jun 2009 19:12:13 +0200
In article <6QoTl.717494$yE1.560528@attbi_s21>,
Sam Wormley <swormley1@xxxxxxxxx> wrote:
oriel36 wrote:
Of the 3 most basic facts about the Earth - it is round,it is rotating
and the length of time it takes to rotate once,the empiricists get the
third fact completely wrong which affects appreciation of the other
two known facts as the 24 hour/360 degree correlation contains
information on the shape of the Earth and the details of its rotation.
Gerald--Since the stars are very far away, they serve as "fixed"
references from which the rotation of the earth about is axis of
rotation can be measured. You can do it. I can do it. Using the
internationally agreed unit of time, the second, we measure
86,164.09 seconds for one rotation of the earth -- star on the
local meridian to star on the local meridian. This is independent
of the earth's shape.
360° in 86,164.09 seconds
That observation contradicts what you wrote, Gerald.
And if you think the "firmament" is rotating around the sun/earth,
rather than earth around the sun, or in addition to this, then this
"firmament" would have to be closer than 1 light year / 2 pi ~= 150
billion km not to violate relativity, or about 1/25th of the observed
distance to the closest star.
In fact, this bound is set many orders of magnitude tighter by
simple triangulation measurements on simple telescopes.
As a reference, the largest observed motion of a star is the
movement of Barnard's star, 10.25 arcsec/yr. This would take around
125 thousand years to orbit th earth; if that was indeed the
center of it's orbit (which it isn't).
So the "firmament" is a firm reference, at least to one part in
several hundred thousand over the course of one year.
If you have different views, please produce hard evidence in the
form of observations, not just conjectures.
For hard info on Barnards star, see the excellent amateur
observations here : http://schmidling.com/barnard.htm
-- mrr
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