Direction of orbital motion

There are two major consequences associated with recognising the
changing orientation of the daylight/darkness line as a property of
the Earth's orbital motion.

1 - The observed rotational emergence of the observer out of the
Earth's orbital shadow and the changing orientation of the daylight
/darkness line tangential to the Sun/Earth line.

2 - The major error in determining the components of the Equation of
Time where that shift in the daylight/darkness line as a property of
the Earth's orbital orientation is ignored in favor of the axial tilt
component which is a property of the Earth's equatorial orientation.


Comments on issue 1.

The direction of the Earth's orbital motion in the direction of the
daylight/darkness line (dawn) is best appreceated by the following
graphic

http://www.mhhe.com/physsci/astronom...ages/04f15.jpg

The arrow constitutes the division of the Earth's orbital shadow from
direct light received from the Sun as is always tangential to the
orbital plane.The shift in direction of the line is conditioned by
Kepler's second law insofar as the anglular difference varies over
the course of an annual orbit.

As axial rotation is constant and moves in and out of an orbital
shadow that is varying its orientation to the Sun,the result is that
the longitude meridians which are fixed to the 24 hour/360 degree
equivalency vary in the time it takes to align with the Sun/Earth
line (noon).

Kepler's second law allied to to the shift in the daylight/darkness
line constitute the major component of the variable unequal day as
observed by the noon determination when a longitude meridian axially
rotates to face the Sun directly along it polar axis.

Comments on issue 2 - The idea that the daylight/darkness line shifts
its orientation through 360 degrees and how that shift varies over
the course of an annual orbit is completely ignored and the axial
tilt of the Earth is then substituted as a factor in the Equation of
Time.The big institutions such as NASA adopt the errors that emerged
in the 17th/18th century as invariably describe the Equation of Time
in hemispherical terms of summer and winter and daylight/darkness
asymmetry -

http://imagine.gsfc.nasa.gov/docs/as...s/980116c.html

Without recognition of the graphic provided , the demonstration of the
change in the daylight/darkness line and its correlation to Kepler's
second law and from there to the Equation of Time adjustment which
isolates axial rotation to 24 hours/360 degrees,people are unlikely
to appreceate the direction of orbital motion at dawn .At the
perihelion and aphelion the direction of orbital motion falls
directly on the daylight/darkness line and varies closer to the dawn
darkness and dawn daylight at other times.

http://www.mhhe.com/physsci/astronom...ages/04f15.jpg


[The astronomical sidereal justification is simply too dumb to comment
on -


http://www.absolutebeginnersastronomy.com/sidereal.gif ]

The only requirement I place on those who view this thread and comment
on it is this,that they actually go outside at dawn and recognise
that the Earth's orbital direction is contained within the region of
daylight/darkness as the Earth axially rotates out of its orbital
shadow.Nothing more is required.


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