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To: mrjesse
I may have thought of a way to explain the idea better :)

Lets pretend that the earth isn't spinning as it orbits the sun or to be more precise it makes one revolution in a year. Much like our moon isn't spinning in relation to the earth.

Now when you look at the sun, its position is fixed in the sky (lets also forget seasonal changes and the barycenter changes). The suns position never changes and its apparent position is exactly the same as its actual position. Do you agree? The sun is still an AU away and it still takes 8.3 minutes for the light to reach us. The suns apparent position (where you point at it) and its actual position are identical, even though the earth is orbiting the sun.

To further cement this idea. Lets put you in a car driving towards an intersection. As you approach the intersection you see another car approaching the intersection from your right. You also notice that the other cars apparent position in relation to your car stays the same, if you were to draw a circle on you windshield the other car would stay in the circle (your head can't move either). You are on an intercept course and if both cars velocity and direction stay consistent then they will collide. This is just another example of the apparent position agreeing with the actual position even though both objects are moving in different directions. This is a trick I use all of the time as a pilot to determine where I am going to land.

Now back to our non spinning earth. We meet at a train station on the equator with the sun shining directly overhead. If we wanted too we could draw a line from the sun through us to the center of the earth and everything would be aligned, apparent position would match actual position. Today we are running an experiment, at exactly 12:00 the sun is going to turn off. So I get in the train and at 12:00 the train leaves traveling at 17.5 miles per minute (that just happens to be the earths rotation speed). at exactly 12:08.3 the world goes dark, and the train stops. I have traveled 145 miles. Lets also assume that the earth was flat for that 145 miles.

Now if we draw this up and put a protractor on the center of the earth we can see that there is about 2.1 degrees of separation between our two positions. That is the difference between where I apparently saw the sun and where you know the sun actually is. If we draw a line from the center of the earth through me we will miss the sun by 2.1 degrees.

That is the difference between the suns actual and apparent position for our little experiment.

626 posted on 07/13/2008 7:25:43 AM PDT by LeGrande
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To: LeGrande
Now back to our non spinning earth. We meet at a train station on the equator with the sun shining directly overhead. If we wanted too we could draw a line from the sun through us to the center of the earth and everything would be aligned, apparent position would match actual position. Today we are running an experiment, at exactly 12:00 the sun is going to turn off. So I get in the train and at 12:00 the train leaves traveling at 17.5 miles per minute (that just happens to be the earths rotation speed). at exactly 12:08.3 the world goes dark, and the train stops. I have traveled 145 miles. Lets also assume that the earth was flat for that 145 miles.

Now if we draw this up and put a protractor on the center of the earth we can see that there is about 2.1 degrees of separation between our two positions. That is the difference between where I apparently saw the sun and where you know the sun actually is. If we draw a line from the center of the earth through me we will miss the sun by 2.1 degrees.


I think your wrong here - your position may be 2.1 degrees around the world, but the sun won't be moved 2.1 degrees in its apparent position. Simple trig. Anyway, I gotta run, but I thought I'd give you a chance to draw it out and say "Oh, oops" before I do so myself.

-Jesse
628 posted on 07/13/2008 10:53:15 AM PDT by mrjesse (Could it be true? Imagine, being forgiven, and having a cause, greater then yourself, to live for!)
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To: LeGrande; Ethan Clive Osgoode; Fichori
Okay this is getting good. I never seen anyone dig them selves in so far. I took the time to draw your diagram up. I tried to make it exactly as you described, except of course I did not draw it to scale because of the astronomical differences in size of the sun, earth, 144 miles, and the earth-sun distance. (In other words, if it were to scale, the sun and the earth would be single dots, and the two points that are 144 miles apart would be on the same dot.) But all the numbers should be correct to real life.

Lets pretend that the earth isn't spinning as it orbits the sun or to be more precise it makes one revolution in a year. Much like our moon isn't spinning in relation to the earth.

Now when you look at the sun, its position is fixed in the sky (lets also forget seasonal changes and the barycenter changes). The suns position never changes and its apparent position is exactly the same as its actual position. Do you agree? The sun is still an AU away and it still takes 8.3 minutes for the light to reach us. The suns apparent position (where you point at it) and its actual position are identical, even though the earth is orbiting the sun.


So far so good. Yes, I agree with the above as far as the 2.07 degrees goes. Of course if the earth is still orbiting the sun at 67K MPH, there will still be 20 arcseconds of stellar aberration, not due to the distance from sun to earth but due to the transverse velocity of the earth.

Remember, Stellar Aberration is due to the observer's motion and Light Time Correction is due to the light source's motion.

... As you approach the intersection you see another car approaching the intersection from your right. You also notice that the other cars apparent position in relation to your car stays the same, ...
This is a trick I use all of the time as a pilot to determine where I am going to land.


I know. Ship captains use this method too.

Now back to our non spinning earth. We meet at a train station on the equator with the sun shining directly overhead. If we wanted too we could draw a line from the sun through us to the center of the earth and everything would be aligned, apparent position would match actual position. Today we are running an experiment, at exactly 12:00 the sun is going to turn off. So I get in the train and at 12:00 the train leaves traveling at 17.5 miles per minute (that just happens to be the earths rotation speed). at exactly 12:08.3 the world goes dark, and the train stops. I have traveled 145 miles. Lets also assume that the earth was flat for that 145 miles.


Now if we draw this up and put a protractor on the center of the earth we can see that there is about 2.1 degrees of separation between our two positions.

Yeah but we're not talking about the angular displacement of the center of the earth, we're talking about the angular displacement of the optical position of the sun. Put your protractor in the center of the SUN and you will see that the angular difference is only 0.000088 Degrees! Not your 2.07!

That is the difference between where I apparently saw the sun and where you know the sun actually is. If we draw a line from the center of the earth through me we will miss the sun by 2.1 degrees.

Yeah but if you draw the line from the center of the sun through you, it will miss the center of the earth by only 0.000088 degrees - and remember, the sun is the source of the light!

That is the difference between the suns actual and apparent position for our little experiment.

It's simple geometry, and you failed. The observer moving 143.5 miles along in the straight and flat line will witness 0.000088 degrees of angular displacement of the sun. But it's not really displacement, the sun actually is at that angle now, because the observer moved.

The angle of the earth's center will have moved 2.07 degrees, but the sun simply won't have, no matter how you wrap it!

Furthermore, if, on your train ride along the 144 miles, just moments before the suns light stopped shining on you, you had pulled out your trusty gravity sundial you would have found that the gravity sundial still pointed to the same place the sun appeared to be! (or at least within the 0.000088 degrees of stellar aberration due to the train's speed. But nowheres near your alleged 2.07 degrees!)

Remember, you said that the sun's optical angle would be 2.07 degrees behind the actual angle pointed to by a gravitational sundial!

Please look at the facts and comment on them. Here are some facts:

Lots of websites falsify your claim of 2.07 degrees of difference between actual/gravitational angle and apparent/optical angle.
You haven't presented a single website of anyone else who agrees with you, and certainly none from NASA or any astronomy college website.

ECO, Fichori, and I have called you on numerous technically inaccurate statements which weren't just honest mistakes on your part.

You have heretofore refused to answer the questions "How far lagged is the optical apparent position of Jupiter, Pluto, and what about a star if it were 12 light-hours away" because you know that your theory would break down and look silly.

According to your claim, the suns apparent position is 2.07 degrees behind its actual and gravitational position, and logically Saturn is ~20 degrees lagged and Jupiter is ~60 degrees lagged, and a motionless star 12 light hours away would be 180 degrees lagged, with its gravity pulling the exact opposite of its apparent optical position -- in other words, it would be on the opposite side of the earth when we looked up and saw it in the night sky!

There is tons and tons of free information about astronomy on the internet nowadays and you cannot find one reputable source that agrees that "yes, the sun is 2.07 degrees lagged, Jupiter is ~60, etc." even though you'd think that this was common knowledge.

So looking at all these facts, how can I or any honest logically thinking person come to any conclusion other then that you have no idea what you are talking about and aren't honest enough to say so?

Is this lagging phenomenon a great secret that only you know? Why am I not seeing any claim for it other then what you say?

Please help me to understand why others aren't making the same claim and why so much of what you said just doesn't make sense.

Thanks,

-Jesse
630 posted on 07/13/2008 4:38:05 PM PDT by mrjesse (Could it be true? Imagine, being forgiven, and having a cause, greater then yourself, to live for!)
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To: LeGrande
Now if we draw this up and put a protractor on the center of the earth we can see that there is about 2.1 degrees of separation between our two positions.

However, this has only 1 observer in 1 position.

[LeGrande 542] Go out at dawn and point a transit right at the edge of the Sun at the instant the first light appears at the horizon (it should be the same point). Now wait 8.3 minutes and measure the distance from the edge of the Sun to the horizon. That is the difference between the Suns apparent position and its true position.
So if we "draw this up and put a protractor on the center of the earth" we learn that the Sun has moved 5.5 million kilometers in 8.3 minutes in its orbit around the Earth, according to you.
636 posted on 07/13/2008 7:51:32 PM PDT by Ethan Clive Osgoode (<<== Click here to learn about Darwinism!)
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