Equinócio

Equinócio refers to the astronomical event when the Sun is directly above the Earth's equator. This occurs twice a year, around March 20th or 21st and September 22nd or 23rd. During an equinox, the length of day and night are approximately equal across the globe, hence the term "equinox" which derives from the Latin words "aequus" meaning equal and "nox" meaning night. At the moment of equinox, the Earth's axis is tilted neither toward nor away from the Sun. This results in a nearly uniform distribution of sunlight across both hemispheres. The spring equinox, also known as the vernal equinox, marks the beginning of spring in the Northern Hemisphere and autumn in the Southern Hemisphere. Conversely, the autumnal equinox signifies the start of autumn in the Northern Hemisphere and spring in the Southern Hemisphere. The precise timing of the equinoxes can vary slightly from year to year due to the Earth's elliptical orbit and the Gregorian calendar system. The equinoxes are significant celestial markers that have been observed and utilized by various cultures for calendrical and astronomical purposes throughout history.