The equality of day and night occurs twice a year, in March and September. As the sun’s rays hit the equator perpendicularly, it is called the main equinox, where the circle of enlightenment passes through the poles. The origin of the word equinox is based on the word aequinoctium, which is a combination of the Latin words aequus (equal) and nox (night).
WHAT IS THE AUTUMN Equinox?
The equinoxes of March 21 and September 23 mark the beginning of spring. September 23 is considered the beginning of spring in the southern hemisphere and autumn in the northern hemisphere. In the southern hemisphere, the days begin to be longer than the nights, while in the northern hemisphere it is the other way around.
September 23 status:
Northern and Southern Hemispheres, the Sun’s rays fall at noon at an angle of 90° to the Equator. The shadow length is zero at the equator. From this date, the sun’s rays begin to fall perpendicular to the Southern Hemisphere. From this date, the days begin to be longer than the nights in the Southern Hemisphere. In the Northern Hemisphere, the opposite happens. This date is the beginning of Spring in the Southern Hemisphere and the beginning of Autumn in the Northern Hemisphere. Enlightenment circle is tangent to the pole. The Sun is visible at both poles on this date. On Earth, day and night become equal. This date marks the beginning of six months of night at the North Pole and the beginning of six months of day at the South Pole.
WHAT ARE THE FEATURES OF Equinox?
The sun rises in the east and sets in the west.
At points on the same longitude, the sun rises and sets at the same time only on equinox days (12 hours apart)
The Sun is visible at both poles.
The tidal amplitude is the highest.
At the equator, the shadow length of the objects becomes zero.
At 12:00 in Turkey, the shadow length is closest to the length of the object.