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**Flat Earth General / Re: Why do I see the sun move with 15 degrees per hour?**

« **on:**July 17, 2019, 12:22:58 PM »

But Sigma Octantis did not move angularly with respect to you at a rate of 15.0 degrees per hour.

But due to the earth's motion, the star does appear to rotate around the southern pole once per day?

Yes. Which is completely different than, and in no way can be described as "seeing that the apparent angular movement is about 15 degrees."

If star makes 360 degrees in 24 hours at constant speed, how many degrees it makes in one hour?IFit makes 360 degrees in 24 hours (and I'll assume you're rounding a sidereal day up to 24 hours) then the rate would be 15 degrees per hour. But only stars on the celestial equator move 360 degrees. Any other star moves by 360 * cos(celestial elevation).

Sigma Octantis or Polaris circle their respective celestial poles in little tiny circles once per day. They areNOTtraversing an angular path of 360 degrees and areNOTmoving at an apparent angular rate of 15 degrees/hour.

During solar day it was roughly 361 degrees per day.

How big is the difference between 15 and 15.042, please?

~~~~~

0.042 / 15 = 0.0028 = 0.28%

Congratulations. You've successfully determined the difference between a solar day and a sidereal day. Which has nothing whatsoever to do with the question or any of the presented arguments.

A star traces a full circle around the celestial pole in one sidereal day.

Its right ascension changes by 360 degrees.

Its apparent angular position changes by 360*cos(elevation from celestial equator) degrees.

Since you're fond of asking questions, let me return the favor.

I observe Polaris. One hour later I observe Polaris again. What is the apparent angular movement I have observed between the two times?

Is it 0.2 degrees?

Is it 15.0 degrees?

Good observation.

Instead of 24 hours for 361 degrees, it is 23 hours and 56 minutes for 360 degrees.

But when you divide those values you get the same result.

For the second time your reply has nothing whatsoever to do with the question or any of the presented arguments.

Observe Polaris. One hour later observe Polaris again.What is the apparent angular movement observed between the two times?

Is it 0.2 degrees?

Is it 15.0 degrees?

Is it something else?

Are you just going to reply with the difference between solar day and sidereal day again?

Please read my post again.

It is not about the difference between solar and sidereal day.

It is aboutthe closeness to those 15 degreesaroud the Earth's axis

whether you apply your solar/sidereal difference or not.

I agree that it is not about the difference between solar and sidereal day. I never said, implied, or hinted that it was.

Please, though, answer this simplified version of the previous question, yes or no. The apparent angular movement of Polaris is 15 (+/-1) degrees per hour.