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Unequal day length
The unequal noon cycle is due to a change in orbital orientation
attached to orbital motion.Extracting axial rotation to isolate the orbital change in orientation is difficult however,using the observed extreme axial rotational orientation of Mercury ,it is easy to identify the change in orbital orientation as a seperate component - http://www.berkeley.edu/news/media/r...anus_5year.jpg This change equally applies to the Earth and replaces the pseudo- dynamic of variable axial tilt to explain the seasons or the unequal length in the noon cycle,For convenience,it is possible to split the orbital orientation change in terms of the solar radiation/orbital shadow boundary - http://www.metoffice.gov.uk/corporat...0060317b_b.jpg The boundary pivots off the Equator allowing for seasonal daylight/ darkness asymmetry North and South of the Equator and provides the main reason for hemispherical weather patterns (seasons) as the length of time a location spends in solar radiation and in the orbital shadow of the Earth rather than inclination to solar radiation. The longitudinal change in the solar radiation boundary is more problematic as axial rotation has never been isolated as an indepedent motion.The longitudinal change causes the noon cycles to globally vary in length .Traditionally ,the variations in daylight/darkness and the total length of the daily cycle have been bound up in the pseudo- dynamic of variable axial tilt or inclination but as observations of Uranus show,the causes are due to a change in orbital orientation. I have already explained to s.a.a. forum where the copnceptual obstacles exist in allowing astronomers to work with a new motion,, which allows the planet a counter motion that is obscured by axial rotation for the most part. I have also determined that it is a point of rest for me,the convenience of splitting the orbital shadow/solar radiation boundary into latitudinal and longitudinal components should not obscure the actual appreciation of the new motion based on a change in orbital orientation.In short,the images from Uranus should be good enough to pursue its application to the Earth - http://www.berkeley.edu/news/media/r...anus_5year.jpg |
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