What is an Equinox?
An equinox occurs twice a year, around March 20/21 (vernal or spring equinox) and September 22/23 (autumnal or fall equinox). It's the moment when the sun's rays shine directly on the equator, making day and night roughly equal in length (12 hours each) across the entire planet.
Where is the Sun During an Equinox?
* The sun is directly over the equator. This means it's neither in the Northern Hemisphere nor the Southern Hemisphere, but right on the line between them.
Day and Night at the Equinox:
* Equal day and night (almost): While the equinox marks a time of nearly equal day and night, there are slight variations due to atmospheric refraction and the Earth's elliptical orbit.
* Across the globe: This equality of day and night applies to all locations on Earth, regardless of latitude.
Important Note:
* While the equinox brings equal day and night, it doesn't mean the sun rises exactly due east and sets exactly due west. This is because the Earth is tilted on its axis, so the direction of sunrise and sunset varies throughout the year.
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