Fall has officially arrived. Here's what to know about the autumnal equinox
Summary
The fall equinox happens on Tuesday when day and night are almost the same length. It marks the start of fall in the Northern Hemisphere and spring in the Southern Hemisphere, with the sun directly overhead at the equator at noon.Key Facts
- The fall equinox splits day and night evenly.
- It signals the start of fall in the Northern Hemisphere and spring in the Southern Hemisphere.
- At the equator, the sun is directly above at noon during the equinox.
- Equinoxes happen when the Earth's tilt is not toward or away from the sun.
- Both the North and South Poles receive sunlight at the same time only during equinoxes.
- The sun rises almost exactly in the east and sets almost exactly in the west on the equinox.
- The word equinox means “equal night” in Latin because day and night lengths are nearly equal.
- Many cultures, like Japan and the ancient Mayans, celebrate the equinox with special events.
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