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Some of the most common mistakes/difficulties
The perspective that the Earth precesses 360 degrees to the central
Sun as a component of its orbital motion thereby obviating the need for axial precession as it is currently understood is not only supported by graphics but also observational evidence of another planet,in this case Uranus. It is a 100% certainty that the Earth's polar coordinates turn in a circle to the central Sun as representative of all locations on Earth hence the graphic of Earth matches the observations of Uranus as it moves along its orbital circuit - http://en.wikipedia.org/wiki/File:Earth_precession.svg http://www.daviddarling.info/images/...gs_changes.jpg In effectively looking at the interaction of daily and orbital motions locally it becomes fairly easy to assign cause with effect such as why there is a polar day/night cycle as the polar coordinates turn towards and away from the Sun or why a planet's climate is defined by the degree of axial inclination where 0 inclination reflects an equatorial climate and 90 degrees a polar climate,the latter view negates the older 'no tilt/no seasons' and gets rid of precession as an axial trait and puts it into a roughly 26 000 year orbital feature. To achieve a local view where most researchers can operate comfortably without constantly referring the Earth motions to external sources,indeed they can work that way without having to know the technical ins and outs of external cyclical references,it is crucial to follow the development of timekeeping systems in tandem with the specific references which comprise the connections between the raw astronomical data and the human formatting of that data into a convenient state. It was nice to witness an engineering feat and the community celebration of that achievement yesterday yet sometimes individual astronomical works do not allow for these things as the transition from an old to a new point of view is often awkward and contentious.The ability of men to explore our planet centuries ago using a watch for navigation purposes is now extended into the modern era where spacecraft venture into the celestial arena and land on other planets and these incredible engineering features tell you almost nothing about astronomy other than the great cycles supply information which humans process to the best of their ability and turn into practical applications. |
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Some of the most common mistakes/difficulties
On Aug 6, 11:42*pm, oriel36 wrote:
The perspective that the Earth precesses 360 degrees to the central Sun *as a component of its orbital motion Yes, we know that. It does not obviate the need to name and recognize the much slower effect of the precession of the equinoxes, if that's what you were saying. The difference between us and you is on which side of the Earth's rotation that effect is. This annual 360 degree change in the Earth's relation to the central Sun is what causes the difference between the 24 hour length of the mean solar day and the 23 hour, 56 minute, and 4 second time interval between successive returns of a star to the meridian. We're also in perfect agreement on that fact. What is in dispute, of course, is my claim (and the claim of the whole of modern-day astronomy, for that matter) that since the solar day is subject to the Equation of Time, while stellar circumpolar motion is not, but is essentially uniform in terms of clock time, it must be the latter which corresponds to the rotation of the Earth, since only a simple motion and not a compound motion is admissible as a freely- moving body's intrinsic rotation. On top of that, as I show on my web site at http://www.quadibloc.com/science/eot.htm the equation of time corresponds precisely to and reflects the characteristics of the Earth's orbit, its elliptical nature and its inclination to the Earth's rotational equator. You claim we've got it all wrong and backwards. Without giving a good reason. And you're actually _surprised_ that when you do something like that, the reaction is occasionally less than polite! John Savard |
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Some of the most common mistakes/difficulties
"Quadibloc" wrote in message ... On Aug 6, 11:42 pm, oriel36 wrote: The perspective that the Earth precesses 360 degrees to the central Sun as a component of its orbital motion Yes, we know that. =========================== Oh good, now you can shut the **** up since you agree with Kelleher, you snipping ****wit. |
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