Today is the first official day of Autumn in Canada and the rest of the northern hemisphere. If you reside in the Northern Hemisphere, you know it as the otherwise called Autumn equinox. For people south of the equator, today actually signals the coming of spring.
This happens when the Sun crosses the celestial equator moving southward (on September 22nd or 23rd). This day is known as the Autumnal Equinox.
There is a common misconception that the earth is farther from the sun in winter than in summer. Actually, the Earth is closest to the sun in December which is winter in the Northern hemisphere.As the Earth travels around the Sun in its orbit, the north-south position of the Sun
changes over the course of the year because of the changing orientation of the Earth’s tilted rotation axes.