autumnal equinox is the solar term after the Bailu solar term, and the day and night are equal in length at the autumnal equinox, but many people have great doubts about this problem. What is the reason for the Equinox Day and night? Why can an egg stand on the autumnal equinox? Let's understand this solar term with the old yellow calendar!
the reason for the day night equinox is that the alternation of day and night is caused by the rotation of the earth. On the day of the autumnal equinox, the sun reaches 180 degrees of the Yellow longitude and directly hits the earth's equator. Therefore, the 24 hours of the day in most parts of the world are divided equally, 12 hours each. The earth rotates all the time. Objects moving horizontally on the ground are bound to deviate continuously to the right (northern hemisphere) or left (southern hemisphere). According to this phenomenon, people can prove that the earth is rotating by analyzing the moving direction of the fired shell. The earth rotates constantly. Due to the action of inertial centrifugal force, the ground gravitational acceleration must be the smallest at the equator and the largest at the poles; The earth cannot be a positive sphere, but must be a rotating ellipsoid with slightly bulging equator and slightly flat poles. The results of gravity measurement and radian measurement confirm the correctness of these views, which also confirms the rotation of the earth from one side. The earth rotates all the time. Because the rotation speed increases with the height, the object must have a higher rotation speed to the East in the process of falling from a high place, and it must fall to the East. In order to prove this, some people have carried out experiments in very deep mines. The test results show that the objects falling from the center of the wellhead always collide with the east wall of the mine at a certain depth, which confirms the rotation of the earth from another side.
why eggs can be set up at the autumnal equinox reason 1: on the day of the autumnal equinox, the day and night in the northern and southern hemispheres are divided equally. The earth's earth axis inclined at 66.5 degrees is in a state of relative balance with the earth's orbital plane around the sun. At the same time, the earth's magnetic field is also relatively balanced, so the egg has the best standing ability. Reason 2: the autumnal equinox is in the middle of autumn. It is neither cold nor hot. People are comfortable, quick thinking, sharp action and easy to succeed.https://www.dailyq-a.com/Culture/30274.html
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