What astronomical event occurs in September, marking the beginning of autumn in the Northern Hemisphere?
A Winter Solstice
B Autumn Equinox
C Summer Solstice
Fact: The autumn equinox, occurring in September, is one of the two points each year when day and night are nearly equal in length. This event symbolises the start of autumn in the Northern Hemisphere, unlike the winter and summer solstices which denote the extremes of daylight.
Correct Answer: Autumn Equinox