Yin Yang, the Sun and Winter Solstice

Allen Tsai has put together some interesting observations on the Solstice patterns.

Happy Solstice! When observing the cycle of the Sun, ancient Chinese simply used a pole about 8 feet long, posted at right angles to the ground and recorded positions of the shadow. Then they found the length of a year is around 365.25 days. They even divided the year's cycle into 24 Segments, including the Vernal Equinox, Autumnal Equinox, Summer Solstice and Winter Solstice, using the sunrise and Dipper positions. They used six concentric circles, marked the 24-Segment points, divided the circles into 24 sectors and recorded the length of shadow every day. The shortest shadow is found on the day of Summer Solstice. The longest shadow is found on the day of Winter Solstice. After connecting each lines and dimming Yin Part from Summer Solstice to Winter Solstice, the Sun chart looks like below. The ecliptic angle 23 26' 19'' of the Earth can be seen in this chart.
When observing the cycle of the Sun, ancient Chinese simply used a pole about 8 feet long, posted at right angles to the ground and recorded …positions of the shadow.

Sun Pole Clock

Then they found the length of a year is around 365.25 days.

They  divided the year’s cycle into 24 Segments, including the Vernal Equinox, Autumnal Equinox, Summer Solstice and Winter Solstice, using the sunrise and Great Dipper positions.
They used six concentric circles, marked the 24-Segment points, divided the circles into 24 sectors and recorded the length of shadow every day. The shortest shadow is found on the day of Summer Solstice.
The longest shadow is found on the day of Winter Solstice.
After connecting each lines and dimming Yin Part from Summer Solstice to Winter Solstice, the Sun chart starts to show the Yin Yang pattern.
The ecliptic angle 23 26′ 19” of the Earth can be seen in the following chart.
MORE
Sun Ecliptic Angel   The Ecliptic is the Sun’s apparent path around the Earth.   It’s tilted relative to the Earth’s equator.   The value of obliquity of the Ecliptic is around 23 26′ 19” in year 2000.

By rotating the Sun chart and positioning the Winter Solstice at the bottom, it will look like this . The light color area which indicates more sunlight is called Yang (Sun). And then interpretations began. The dark color area has less sunlight (more moonlight) and is called Yin (Moon).  Yang is like man. Yin is like woman. Yang wouldn’t grow without Yin. Yin couldn’t give birth without Yang. Yin is born (begins) at Summer Solstice and Yang is born (begins) at Winter Solstice. Therefore one little circle Yin is marked on the Summer Solstice position. Another little circle Yang is marked on the Winter Solstice position. These two little circles look like two fish eyes.

How far back these early observations go is unknown. Many summaries of Yin and Yang ignore this early source in astronomy observations.

But here we are: late December, 2013. (son).      Yang Chi begins to grow inside the ground. The seed begins to absorb water and  grow too.

i_ching_24_fu one yang and 5 yin

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