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Old April 5th 18, 10:35 AM posted to sci.astro.amateur
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Default Proving the Earth's orbital motion.

On Wednesday, April 4, 2018 at 10:37:33 PM UTC+1, Gerald Kelleher wrote:
The astronomers at the time of Copernicus were using the motion of the Sun through the constellations along with the motions of the other planets for prediction purposes but they never used a North/South motion of the Sun by inventing a celestial Equator


Utter nonsense: right back to Ptolemy's Almagest, the positions of stars were mapped using a celestial sphere with an equator, and North/South motion of the Sun in the sky is obvious to anyone who ever looked at the sky in summer and winter.

Gerald was shocked when he recently saw a star map with the celestial Equator across the middle and the Ecliptic swinging North and South across it. This is because he never looks at the sky, or apparently, at a star map until recently, he can't think in 3D, and bases his bizarre rants on random gifs and youtube videos instead.