Question.
What is an equinox?
( Chapter 3: Motions of the Earth, Class 6- The Earth: Our Habitat ( GEOGRAPHY), SOCIAL SCIENCE)
Answer.
An equinox is an event that occurs twice a year when Earth's equator passes through the center of the Sun, resulting in nearly equal lengths of day and night.
In equinox, neither of the earth's poles is tilted towards the sun.
In the equinox, mid-day sun rays directly fall on the equator.
There are two equinoxes in a year namely Spring Equinox and Autumn Equinox.
Vernal Equinox (Spring Equinox):
Spring Equinox occurs around March 20th or 21st in the Northern Hemisphere and September 22nd or 23rd in the Southern Hemisphere. During the vernal equinox, day and night are approximately equal in duration, and it marks the beginning of spring in the Northern Hemisphere and the start of autumn in the Southern Hemisphere.
Autumnal Equinox (Fall Equinox):
Autumnal Equinox occurs around September 22nd or 23rd in the Northern Hemisphere and March 20th or 21st in the Southern Hemisphere. The autumnal equinox also features nearly equal day and night lengths. It marks the start of the Autumn season in the Northern Hemisphere and the beginning of spring in the Southern Hemisphere.
During equinoxes, the Sun is directly above the Earth's equator, creating a balance of daylight and darkness across the globe.
Equinoxes are significant astronomical events that help mark the changing of seasons. They are important for calendars and have been celebrated in various cultures throughout history.
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