Forget the sun! The topic is "red shift". The shift in frequency of an electromagnetic wave is taken as evidence of relative motion.
If the flat earthers have another explanation, I've yet to see it. BUT, it is still a valid argument that can hardly be interpreted any other way!
Or more distant stars aren't identical to nearer stars (not unlikely under FET, most models have everything centred around the Earth), or light behaves differently under FET (pretty much certain)...
How can one have significantly "more distant stars" on the flat earth?
Though admittedly FET is so vague about celestial objects that one can hardly know what to expect.
But the fact remains red and blue shifts under the currently accepted model.
I would again say that if flat earthers cannot explain that then another . . . . . . .
But your claim "distant stars aren't identical to nearer stars" is a bit hard to swallow.
What you are claiming is that stars, even the nearest stars, a made of different matter - that's more than I'll accept.
You, being a mathematician, might be able to swallow that sort of thing.
There is no way in the world that we are going to ignore things, just because they are not "part of the flat earth model".
If observations are made on the real earth and the Globe model can explain them but the flat earth cannot, though cheese!
Once again, that's not what I said. The issue is how many arguments follow from things that only hold under RET. How are you meant to draw any FE conclusion from that?
In many cases, I think that it's more like "how many arguments follow from things that only hold" on the real earth.
Please note that there is a big difference between
observation or
measurement and
argument.
And I claim that any
observation or
measurement made on the "real earth" must be explanable under FET.
One such case is an extension of the
Eratosthenes' measurement that you brought up in:
Look up Eratosphenes'(sic) experiment; the stated achievement of it is that it measured the curvature of the Earth. One of the ways the result can be explained is to point out that he assumed the Sun was incredibly far away, and if you assume the Earth is flat, instead of measuring curvature the experiment gives you distance to the Sun.
In the following, I am using modern values as the early values are subject to considerable conjecture.
Sure,
Eratosthenes found that the sun's elevation changed by 7.2° when moving from a location where the sun was overhead, Syene, to one 800 km north.
From this, he deduced that since 7.2° is one fiftieth of a circle, that the circumference of the earth was 50 x 800 = 40,000 km.
When applied to a flat earth and a near sun these same figures do give a distance to the sun of
3,958 miles or 6370 km.See
<< Look who this was to! >>
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It is easy to show (it's in "the Wiki" anyway) that sun height = distance/tan(angle) = 3,958 miles or 6370 km.
Now it is very poor science to do a measurement only once, not that I blame
Eratosthenes, 800 km was a big hike in those days.
But, now we can use much larger "base-lines", so if we chose
45° the sun height comes out at
5000 km or 3107 miles or if the earth is a Globe 40,000 km or 24,854 miles.
67.5° the sun height comes out at
3112 km or 1934 miles or if the earth is a Globe 40,000 km or 24,854 miles.
90° the sun height comes out at
0 km or 0 miles or if the earth is a Globe 40,000 km or 24,854 miles.
From this are we to deduce that the height of the sun on the flat earth is 6370 km, 5000 km, 3112 km or ZERO? You tell me!
So, trying to apply
Eratosthenes' method to a flat earth gives very inconsistent results, but applying the to same
method to the Globe's circumference the very consistent 40,000 km circumference.
It does look as though there is
"Flat Earth Science" where you do it once and keep the answer if it "looks" good and
"Real Earth Science" where you repeat the experiment under different conditions till some consistency is achieved.
Note that the above results are "too good" in that there are based on an ideal data - just as "the Wiki" does.
These posts go into (too much) more detal:
So you think the sun is about 5,000 km high? « on: August 24, 2016, 02:22:33 PM » Re: Does ANYONE have ANY evidence that we live on a spinning ball? « Reply #47 on: August 26, 2016, 11:24:04 PM »Jane, you're flogging a dead horse and it's never going to get up and run!