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Old March 13th 19, 12:05 PM posted to sci.astro.amateur
Gerald Kelleher
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Default An astronomical prediction

Last month the thread involved showing Mercury move in direct motion and opposite the motion of the background stars using the central Sun as a reference for both, after all, the change in position of the stars is due to the orbital motion of the Earth -

https://sohowww.nascom.nasa.gov/data...current_c3.gif

https://www.theplanetstoday.com/


Towards the middle to end of August, both Mercury and Venus will pass behind the Sun along with Mars further from the Earth which can only be in direct motion within this framework whereas Venus and Mercury move in both direct/retrograde motion.

This is the ladder for observational astronomers to climb up and theoretical researchers to climb down otherwise what is the point of calling it astronomy if something so delightful and made possible by 21st century spaceflight is ignored for celestial sphere concerns.