The arrival of the equinox means days will soon be longer than nights in Australia and the southern hemisphere.

This year's spring equinox occurs on Monday, marking the moment the sun is positioned directly above Earth's equator.

This causes the solar terminator - which is the line between day and night - to lie perpendicular to our equator and run straight between our north and south poles.

Day and night will be roughly equal in length throughout the southern hemisphere on the date of the equinox. Following this, days will be longer than nights for the next six months.

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