China Naming Network - Almanac query - Why is there no shadow on the vernal equinox of the sundial?
Why is there no shadow on the vernal equinox of the sundial?
Why is there no shadow on the vernal equinox of the sundial? Because: beginning of autumn, beginning of spring, at this time, the sun's trajectory is parallel to the equatorial dial. There is no shadow on the sundial except the side, so you can't mark the time. In other words, if one day is sunny, the sundial can't mark the time. This day is beginning of spring or beginning of autumn.
上篇: Did Genghis Khan really ask Qiu Chuji how to keep fit and live longer in his later years? 下篇: Yang Muxuan's name is good. Animal husbandry: Zhou animal husbandry, people animal husbandry and leadership style; Animal husbandry: next to cattle, the animal year belongs to sheep, and cattle, sheep and horses are born together, which can be helped by nobles; A small room or balcony with windows.