Autumn equinox marks start of longer nights in southern hemisphere

20 Mar 2024
Autumn equinox marks start of longer nights in southern hemisphere

6:45am Mar 21, 2024

Australians are now facing six months of longer nights after yesterday marked the southern hemisphere's autumn equinox.

Equinox - Figure 1
Photo 9News

The autumn and spring equinoxes, which take place in March and September every year, are days when the sun is positioned directly over the equator, and the time of day and night are about equal.

While the equinox in September signals the start of longer days, yesterday's event means six months of longer nights are underway.

The autumn equinox has marked a shift in daylight for the southern hemisphere. (Weatherzone)

"Following this week's equinox, Earth's south pole starts to tilt further away from the sun and the northern hemisphere becomes tilted more towards the sun," Weatherzone said in an explainer.

"This change in Earth's tilt relative to the sun causes nights to become longer than days everywhere south of the equator."

Complementing the equinoxes are the solstices, which mark in winter and summer the shortest and longest days of the year.

In Australia, the winter solstice for 2024 is set for Friday, June 21.

FOLLOW US ON WHATSAPP HERE: Stay across all the latest in breaking news, celebrity and sport via our WhatsApp channel. No comments, no algorithm and nobody can see your private details.

Read more
Similar news
This week's most popular news