Science

Winter is coming, but what is the autumnal equinox?

Winter is coming, but what is the autumnal equinox?”

Today is the autumnal equinox, which signals the end of summer and the start of autumn in the northern hemisphere - and when day and night are equal in many places. It is the first official day of autumn where daytime and nighttime are approximately the same lengths.

PAGASA explained that autumnal equinox occurs when the sun's declination is zero degrees and there are 12 hours of day and 12 hours of night at all points on the earth's surface, hence day and night will have equal length on Earth.

From this description, you can probably conclude that the Autumnal Equinox is an astronomical season, and not a meteorological season.

The result is an nearly equal amount amount of daylight and darkness in the northern hemisphere.

People genuinely believe this - thinking that there's something to do with gravity which means that (for just one day) you can balance an egg at the equinox in spring or autumn. Along with shorter days and cooler temperatures, the equinox also means Americans will soon be changing their clocks. On this day the sun hits directly along the equator (at 3:02 p.m. CST to be exact) and evenly distributes sunlight to both the northern and southern hemispheres. Daylight Saving time is set to end at 2 a.m. on November 5, when (almost) all of the USA will move their clocks back an hour.



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