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Old August 3rd 17, 10:08 PM posted to sci.astro.amateur
Gerald Kelleher
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Default Modification to EPIC graphics

https://www.youtube.com/watch?v=CFrP6QfbC2g&t=6s

The current EPIC image shows the Antarctic Continent just coming into view as the forward motion of the Earth turns the planet slowly with the North and South poles turning parallel to the orbital plane.

What does it take to present a graphic demonstrating two parallel lines representing the nature of the motion of the poles across the fully illuminated face of the Earth from an orbital standpoint. The North pole constantly retains a distance of 1625.54 miles below that fully illuminated face at all times from March to September Equinox when it then becomes the turn of the South pole.

The distance between the North pole and the circle illumination North to South is 1625.54 miles which is maintained constantly throughout an orbit but the distance East to West shrinks from the North pole to the circle of illumination after the June Solstice as it does for the South pole. On the September Equinox the poles exist on the circle of illumination hence the distance is zero.