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Old March 20th 18, 04:39 PM posted to sci.astro.amateur
Gerald Kelleher
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Default The Equinox defined

https://en.wikipedia.org/wiki/Deep_S...-tilt-23.4.gif

Relative to the orbital plane, the Earth on the September Equinox will rotate in a roughly NW to SE direction (if orbital traits were given North, South, East and West Coordinates) whereas presently the Earth will rotate in a SW to NE direction.

Apart from the accurate time lapse above on the September Equinox, the EPIC satellite shows an accurate perspective on the December Solstice -

https://epic.gsfc.nasa.gov/?date=2017-12-21


The missing piece in the sequence of images is the present March Equinox which requires the South pole to turn parallel to the orbital plane as a function of the unseen orbital motion of the Earth from September to March.

There is the awful pivoting circle of illumination from NASA and the equally vapid rotating circle of illumination from NOAA -

https://twitter.com/NOAASatellites


Assuming there are people of integrity out there, the actual explanation for the Equinox event offers so many opportunities for research and gives back a thousand times the effort put into understanding the planet's two distinct day/night cycles and the rotations behind them. I do not denigrate this newsgroup as other are wont to do, this is perhaps one of the few places where original and meaningful work is accomplished.