Eccentricity has been in decline for all of recorded human history, and will continue to decline until about 30,016 AD.
A measure of the deviation from perfect circularity, eccentricity of the earth's orbit around the sun is cyclical and has been in decline for tens of thousands of years.
In 5,000 BC the eccentricity of the earth's orbit measured .018869. Today it measures .016703, a less elliptical and more circular orbit by 11.5% in just 7,000 years.
But by about 30,016 AD eccentricity will reach a nadir around .0023088, meaning earth's orbit around the sun will be almost 88% more circular than it was in 5,000 BC.
The more circular the orbit, the less extreme and more predictable should be the gravitational and climatic changes exerted on the earth by our sun.
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