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The rise of celestial sphere thinking



 
 
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Old September 22nd 17, 03:36 PM posted to sci.astro.amateur
Gerald Kelleher
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Default The rise of celestial sphere thinking

Go ahead and enjoy the spectacle where the forward orbital motion of the Earth turned the Southern polar latitude parallel to the orbital plane just enough to bring the Sun into view on this Equinox -

https://www.usap.gov/videoclipsandmaps/spwebcam.cfm

 




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