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陶寺遺址天象台 Taosi Observatory

 是日文鐘的一種, 2400~1900 BC 建造 (堯國)


 

 The slits is said to be only 1 degree in width. So it will not be possible to adjust for

axial precession 歲差


 


if my calculation is correct the day of solstice will move 1 degree in 67 years.

due to change of "obliquity of ecliptic( 黃赤交角)" the position of sun is moved by ~0.5 degree 4000 years ago. Then the slits will not should still fall in line with the solstice and equinox dates.

springer

kaogu

sociostudies

obliquity of ecliptic

archaeoastronomy
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