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http://www.timeanddate.com/worldcloc...omy.html?n=468
The South polar coordinate is now turning through the circle of illumination and away from the Sun which will disappear for the next 6 months at those coordinates.In short,it is an orbital cycle and the polar day/night cycle under consideration here where daily rotation and its effects are set aside. The distance turned by the coordinate from the time it enters the circle of illumination/when the Sun disappears to the time it exits in late September and the Sun re-appears defines the orbital traveling axis around which these polar coordinates turn,In the Northern section it would appear to be above North-Eastern Alaska.It is treating the polar coordinates as arbitrary turning points to the central Sun and ignoring the daily rotation of the planet that defines the North/South orbital points which cause the Sun to set tomorrow at the South Pole and rise at the North. |
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"oriel36" wrote in message
... http://www.timeanddate.com/worldcloc...omy.html?n=468 ... cause the Sun to set tomorrow at the South Pole and rise at the North. Actually, because of atmospheric refraction, the Sun rises at the North Pole a few days before the equinox, and similarly sets at the South Pole a few days after, being fully visible at both poles on the day of the equinox. |
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On Mar 20, 6:59*pm, "Gavino" wrote:
"oriel36" wrote in message ... http://www.timeanddate.com/worldcloc...omy.html?n=468 ... cause the Sun to set tomorrow at the South Pole and rise at the North. Actually, because of atmospheric refraction, the Sun rises at the North Pole a few days before the equinox, and similarly sets at the South Pole a few days after, being fully visible at both poles on the day of the equinox. You are fine.This type of modification which replaces a nondescript 'tilt'* with an additional orbital day/night cycle and its quasi- rotational cause arising solely from the orbital behavior of the planet would only appeal to astronomers and they have proven difficult to find or don't exist at all.The orbital 'sunrise/sunset' at the polar latitudes is a window into the orbital behavior of the planet so we are dealing with large scale planetary dynamics and leave refraction to those who generally can't raise themselves to the discipline of Copernicus,Kepler and Galileo. * "An equinox occurs twice a year, when the tilt of the Earth's axis is inclined neither away from nor towards the Sun, the center of the Sun being in the same plane as the Earth's equator." Wikipedia |
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On Tue, 20 Mar 2012 19:59:28 +0100, "Gavino"
wrote: Actually, because of atmospheric refraction, the Sun rises at the North Pole a few days before the equinox, and similarly sets at the South Pole a few days after, being fully visible at both poles on the day of the equinox. "A few days" is here approximately 1.5 days. |
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On Mar 20, 9:36*pm, Paul Schlyter wrote:
On Tue, 20 Mar 2012 19:59:28 +0100, "Gavino" wrote: Actually, because of atmospheric refraction, the Sun rises at the North Pole a few days before the equinox, and similarly sets at the South Pole a few days after, being fully visible at both poles on the day of the equinox. "A few days" is here approximately 1.5 days. Schlyter ,if you were any sort of a proper astronomer you would have moved the orbital cycle towards our latitudes where it combine with the daily rotational cycle to account for the variations in the natural noon cycle.The trick is to separate the axis of rotation for both cycle seeing that the North/South poles represent null daily rotation yet turn around a traveling axis and cause polar day to turn to polar night by turning through the circle of illumination and either towards or away from the Sun. |
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oriel36 wrote:
On Mar 20, 9:36 pm, Paul Schlyter wrote: On Tue, 20 Mar 2012 19:59:28 +0100, "Gavino" wrote: Actually, because of atmospheric refraction, the Sun rises at the North Pole a few days before the equinox, and similarly sets at the South Pole a few days after, being fully visible at both poles on the day of the equinox. "A few days" is here approximately 1.5 days. Schlyter ,if you were any sort of a proper astronomer you would have moved the orbital cycle towards our latitudes where it combine with the daily rotational cycle to account for the variations in the natural noon cycle.The trick is to separate the axis of rotation for both cycle seeing that the North/South poles represent null daily rotation yet turn around a traveling axis and cause polar day to turn to polar night by turning through the circle of illumination and either towards or away from the Sun. So what you are actually saying is this: Let's ignore the fact that the sun is visible at both poles on the equinox because it invalidates Oriels infantile theories |
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In article ,
"Gavino" wrote: "oriel36" wrote in message ... http://www.timeanddate.com/worldcloc...omy.html?n=468 ... cause the Sun to set tomorrow at the South Pole and rise at the North. Actually, because of atmospheric refraction, the Sun rises at the North Pole a few days before the equinox, and similarly sets at the South Pole a few days after, being fully visible at both poles on the day of the equinox. Also because its upper limb rises earlier, and sets later, than its geometric centre. Both effects are most pronounced at high latitudes. -- Odysseus |
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On Mar 21, 8:07*am, Mike Collins wrote:
So what you are actually saying is this: Let's ignore the fact that the sun is visible at both poles on the equinox because it invalidates Oriels infantile theories With all due respect to atmospheric refraction and its effects in many areas,the immense and noble discipline of planetary dynamics focuses attention of the polar coordinates turning through the circle of illumination and into their respective orbital cycles of day or night.While the observers for refraction are many,the audience for the orbital dynamic are few. Everything from the annual tidal cycles to the observed variations in natural noon are contingent on knowing that the polar coordinates act like a beacon into the orbital behavior of the planet,a particularly 21st century view which incorporates the emerging astronomy of planetary comparisons. |
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oriel36 wrote:
On Mar 21, 8:07 am, Mike Collins wrote: So what you are actually saying is this: Let's ignore the fact that the sun is visible at both poles on the equinox because it invalidates Oriels infantile theories With all due respect to atmospheric refraction and its effects in many areas,the immense and noble discipline of planetary dynamics focuses attention of the polar coordinates turning through the circle of illumination and into their respective orbital cycles of day or night.While the observers for refraction are many,the audience for the orbital dynamic are few. Everything from the annual tidal cycles to the observed variations in natural noon are contingent on knowing that the polar coordinates act like a beacon into the orbital behavior of the planet,a particularly 21st century view which incorporates the emerging astronomy of planetary comparisons. Let's try some planetary comparisons then, http://www.science-frontiers.com/sf071/sf071a06.htm Describes the " hot poles" of mercury. Mercury's sidereal day explains this phenomenon perfectly. Lets see your explanation. |
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On Mar 21, 1:48*pm, Mike Collins wrote:
oriel36 wrote: On Mar 21, 8:07 am, Mike Collins wrote: So what you are actually saying is this: Let's ignore the fact that the sun is visible at both poles on the equinox because it invalidates Oriels infantile theories With all due respect to atmospheric refraction and its effects in many areas,the immense and noble discipline of planetary dynamics focuses attention of the polar coordinates turning through the circle of illumination and into their respective orbital cycles of day or night.While the observers for refraction are many,the audience for the orbital dynamic are few. Everything from the annual tidal cycles to the observed variations in natural noon are contingent on knowing that the polar coordinates act like a beacon into the orbital behavior of the planet,a particularly 21st century view which incorporates the emerging astronomy of planetary comparisons. Let's try some planetary comparisons then, http://www.science-frontiers.com/sf071/sf071a06.htm Describes the " hot poles" of mercury. Mercury's sidereal day explains this phenomenon perfectly. Lets see your explanation. Observers here have spent the best part of 6 years ignoring conclusive observations that the daily rotational alignment of Uranus remains fixed in one direction in its annual orbit just as the alignment of the Earth is to Polaris,the polar coordinates turn in a circle to the central Sun and can be seen to do so - http://www.daviddarling.info/images/...gs_changes.jpg The South to North daily rotation of Uranus combines with the East to West quasi-rotation to the central Sun generating a uniquely polar climate on Uranus while the Earth's climate is largely Equatorial and with less than a 30% polar influence as there is a 23 1/2 degree separation between the intrinsic rotational axis and the traveling orbital axis while the angle of Uranus is close to 90 degrees. While not directly at the polar coordinates,these webcams at 77 degrees S which would have enjoyed constant sunlight for the last 6 months are now descending into darkness - http://www.usap.gov/videoclipsandmaps/mcmwebcam.cfm An astronomer should be capable of explaining the transition from polar daylight to polar darkness without the slightest hesitation rather than rely on the older and less productive 'tilt' to the Sun explanation or some variation on that theme.So,planetary comparisons reveal information that would otherwise be difficult to attain,I know this because the effort it took to disentangle the orbital trait from daily rotation was considerable yet once the major obstacle was overcome and modern imaging along with terrestrial effects arrive,the perceptual burden vanishes or almost so. For the longest time I have wished that this new approach to the equinoxes be handled in a more dignified manner but perhaps this is the way new discoveries emerge,I just can't see any reason to maintain an awkward view that won't answer anything and expose a type of apathy out there - "An equinox occurs twice a year, when the tilt of the Earth's axis is inclined neither away from nor towards the Sun, the center of the Sun being in the same plane as the Earth's equator." Wikipedia |
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