Equinox March 2014

You can all consider yourselves astronomers when you recognize that there are actually two separate day/night cycles corresponding to dual rotations with special attention given to the North and South polar locations which see the Sun rise once a year at the Equinox and then set at the opposite Equinox.

The voodoo chanters are out in force when something productive is brought to the attention of the wider community and when there is such nonsense surrounding the terrestrial science of climate,the introduction of the cause of the polar day/night cycle is an antidote that is really needed.

To get to the explanation for the Northern and Southern seasons requires an explanation for the polar day/night cycle first and as yet I have yet to see somebody adopt the fact that aside from and in addition to daily rotation the Earth turns once to the central Sun. There is nothing apparent about that surface rotation as it is intrinsic to the surface of the planet and as a product of the Earth moving through space and around the Sun.

"oriel36" wrote in message
...
The North/South poles are always 23 1/3 degrees above or below the full face of the Earth that
receives solar radiation as they are carried around in a circle to the central Sun.

Nonsense - that's only true at the solstices.
For example, at the equinoxes the poles are exactly on the edge of "the full face of the Earth
that receives solar radiation" - that's why the sun rises or sets at the poles then.

On Thursday, March 13, 2014 8:25:34 PM UTC, Gavino wrote:
"oriel36" wrote in message

...

The North/South poles are always 23 1/3 degrees above or below the full face of the Earth that

receives solar radiation as they are carried around in a circle to the central Sun.



Nonsense - that's only true at the solstices.


Lets get the real nonsense out of the way first,in this case the extremely odd tilting of the circle of illumination off the rotational equator and an exceptionally bad misuse of imaging by NASA -

http://en.es-static.us/upl/2011/09/s...on-_earth.jpeg

Rather than adopting the dual rotations corresponding to the dual day/night cycles and commensurate with the modern day tools.



For example, at the equinoxes the poles are exactly on the edge of "the full face of the Earth

that receives solar radiation" - that's why the sun rises or sets at the poles then.

The polar day/night cycle is fairly straightforward in terms of observation as the Sun rises at one Equinox on one side and descends at the other at the opposite sides of the Earth hence a required surface rotation.

The circle of illumination,despite the misuse of NASA imaging,is always tangential to the ecliptic plane and this forms the bulwark against which to gauge the orbital component of rotation and especially the rotation of the polar locations parallel with the ecliptic plane and always 23 1/3 degrees above or below the full face of the Earth that faces the Sun -

http://www.masil-astro-imaging.com/S...age%20flat.jpg

Had the the foresight to put a telescope on the Mar's rover it would be possible to observe the polar coordinates turn through the circle of illumination within the upcoming week but essentially that will happen sometime in the future.

[ Almost impossible to post through google groups this weather ]

On Sun, 16 Mar 2014 11:14:50 -0700, oriel36 wrote:

[ Almost impossible to post through google groups this weather ]

Yes; it has been progressively more difficult for the past few days, until
I have finally gone to an alternative until the situation is resolved.

John Savard

On Sunday, March 16, 2014 2:33:35 PM UTC-4, John Savard wrote:
On Sun, 16 Mar 2014 11:14:50 -0700, oriel36 wrote:

[ Almost impossible to post through google groups this weather ]

Yes; it has been progressively more difficult for the past few days, until

I have finally gone to an alternative until the situation is resolved.

Google Groups seems to go through this about twice year.

Surely there is someone who has come to the growing realization that the polar day/night cycle is simply a consequence of the orbital motion of the Earth through space as the North/South polar surface points turn in a circle to the central Sun as is therefore an additional surface rotation.

http://www.masil-astro-imaging.com/S...age%20flat.jpg

http://www.msss.com/mars_images/moc/...mericas250.jpg

When teachers explain the seasons to students they start here with the great orbital day/night cycle and its cause and then introduce the daily cycle.

In article ,
oriel36 wrote:
Surely there is someone who has come to the growing realization that the
polar day/night cycle is simply a consequence of the orbital motion of
the Earth through space

Yes....

as the North/South polar surface points turn in
a circle to the central Sun as is therefore an additional surface
rotation.

No. Orbital motion has no rotational component. Things moving through
space don't turn of themselves, something has to make them turn. The
earth continues to point at Polaris as it revolves around the sun because
that's just what orbiting things do: they stay pointed in one direction.

You seem a bit subdued lately, Gerald. Perhaps it's actually getting
through to you that this perspective is the far simpler and more
productive one.

--
David Goldfarb |"'Playing with the use-mention distinction"
| isn't 'everything in life, you know.'"
| -- Douglas R. Hofstadter

On Monday, March 17, 2014 11:13:34 PM UTC-6, David Goldfarb wrote:
Orbital motion has no rotational component.

True, but if you measure rotation relative to the line between the Earth and the Sun, then orbital motion causes rotation relative to that line. (It's like the dog with five legs.)

John Savard

On Tuesday, March 18, 2014 5:13:34 AM UTC, David Goldfarb wrote:
In article ,

oriel36 wrote:

Surely there is someone who has come to the growing realization that the

polar day/night cycle is simply a consequence of the orbital motion of

the Earth through space



Yes....



Then you look at the characteristics of that orbital motion and it is so much easier to look at these things with the circle of illumination in place and then gauge the single surface rotation from that perspective -

http://www.masil-astro-imaging.com/S...age%20flat.jpg

http://www.msss.com/mars_images/moc/...mericas250.jpg

So, it is a matter of getting people on board using the polar day/night cycle and its dynamical cause as a far more comfortable introduction to seasonal changes insofar as it shifts the tendency away from being mesmerized by stellar circumpolar motion/Polaris and shifting attention to terrestrial effects and a surface rotation to the central Sun aside from and in addition to daily rotation.

Presently the polar coordinate are very close to the circle of illumination by virtue that the Earth's orbital behavior around the Sun in an analogous and kinematic sense is more like the bearing end of a crankshaft where the piston rod maintains a constant orientation than a chain -

http://www.youtube.com/watch?v=0YX06bvWVQY

All sides of the bearing face the center of orbital motion at some stage hence a surface rotation,although it does not completely scale up to planetary dynamics it should be enough for reasonable people engaged in this second surface rotation.


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Posting through google groups is shocking this last week and more miss than hit.

There is so much rubbish about 'the sun crossing the celestial equator' as the only description of today's event when it is so much more enjoyable to appreciate the Earth's orbital motion through space and the single surface rotation arising from its orbital behavior -

http://www.masil-astro-imaging.com/S...age%20flat.jpg

The analogy to the bearing end of a crankshaft and how the piston rod acts like the polar points on the Earth's surface is such an easy way to appreciate planetary motion and why all parts of the Earth/bearing face the center of its orbital journey -

https://www.youtube.com/watch?v=YV9WkQkUHZ4


So the answer to why we have Spring today only requires a slight adjustment to explaining the polar day/night cycle first by looking at the single surface rotation to the central Sun arising from the orbital behavior of the Earth.

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Still waiting for google groups to sort itself out.