Dear Peaker,Peaker wrote: ↑Wed Nov 27, 2019 11:43 pm I guess what is baffling to me is when you say that the movement all takes place in the last four minutes. I can’t see that . . . I see the star moving incrementally over the whole 24 hr period. Do Copernicans say that the movement takes place in the last four minutes of the day? Is there another way of you putting this?
On a practical level I’ve another question. How are these observations taking place when the stars are not visible throughout the day when the Sun is at its zenith?
I can certainly appreciate your "bafflehood" - as it took me a long, long time to wrap my head around this spiny yet fundamental sidereal-vs-solar day issue !
No, Copernicans don't say that. They say that, at the completion of a sidereal DAY (23h56min) a given star will return to the same RA position it had "one year earlier" - whereas the Sun has then moved "to the left"(Eastwards) by about 4minutes - which is, of course, precisely what is observed. Hence, they say that 4 more minutes are needed for the earthly observer to line up again with the Sun (the solar DAY - 24h). In this short 4-min period, BOTH the star and the Sun are in fact observed to move by ca. 4 minutes "to the right" (Westwards).
But there's a problem with this - a HUGE problem (that is, under the Copernican paradigm) - and I now realize that this whole issue can be better explained as follows. Dear Peaker, I would like you to perform the following simple experiment - based on this three-frame animation that I posted yesterday:
1: Hold up your index finger in front of your eyes and call it "the SUN". Your head / cranium will be "EARTH", ok?
2: Choose a distant tree in your neighborhood and call it "a distant STAR".
3: Place your index finger slightly to the right of the tree (just as in the above animation showing the Sun slightly to the right of that reference star).
4: Now, hold your finger steady and move your head sideways (from left to right) so as to enact/simulate Earth's supposed daily (left-to-right) 2.5-million-km displacement due to its alleged counter-clockwise (and hypersonic) orbital motion around the Sun (as of Copernican heliocentric theory). You will see your finger moving CLOSER to the tree. So far so good : this is what is indeed observed.
5: Next, slowly ROTATE your head ever-so-slightly to the left (so as to enact/simulate those 4 minutes of Earth's rotation separating the sidereal day from the solar day ). Uh oh !... You will see your (immobile) finger moving again FURTHER AWAY from the tree - as if the Sun now receded from our reference star.
Well, this is certainly NOT what is observed ! What is observed during those crucial 4 minutes (as shown in my above animation I made using screenshots of the NEAVE Planetarium) is that BOTH the Sun and the reference star drift to the right (or "Westwards") at a pretty much equal rate. The Sun does NOT recede from the reference star in those 4minutes - since it continues to move Eastwards (at its constant orbital speed of 107,226 km/h) - just as propounded by the TYCHOS model.
PS: As for your question regarding "daylight observations of stars"(which are extremely hard yet not impossible), please understand that we may reasonably trust the stars' daytime celestial positions as simulated by the various online digital planetariums.