The autumn equinox this year takes place on Tuesday, September 22, at 2.30pm BST. This equinox heralds the end of summer and the approaching of autumn. This event will result in cooler temperatures, and shorter days for us in the northern hemisphere, home to almost 90 percent of the planet’s population. Conversely, for those in the southern hemisphere, the equinox signifies the opposite – warmer weather and the anticipation of spring.
This is best understood as being the degree to which Earth tilts relative to the Sun.
As a result, different sections of the Earth receive more or less sunlight as the planet rotates.
During the northern hemisphere’s winter season, the southern hemisphere is tilted more towards the sun, and vice versa.
Solstices are known to be the two days when one side of the planet is tilted the farthest away from our solar system’s sta.
December 21 sees the northern hemisphere receiving less than nine hours of daylight, while the southern hemisphere receives slightly more than 15.
There are only two occasions of the year when Earth’s axis is not tilted towards or away from the Sun.
These events are recognised as causing sunlight to hit the northern and southern hemispheres equally — are equinoxes.
These equinoxes find both sides of the planet experiencing almost exactly 12 hours of daylight and darkness.
This means should someone stand directly on the equator at 2.30pm BST on Tuesday, their shadow would be at its absolute minimum.
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World news – GB – Equinox 2020: What causes the autumn equinox?