It happens on time every year! But, not exactly at the same time. What the heck, is, ‘it’? I threw in those commas to slow readers down and contemplate for a bit. In the course of our 365.25 day yearly tour around the sun (that extra quarter of a day each year is what makes us need to throw in an extra day every four years in February to catch up to the Earth’s actual full revolution), the earth tilts at ever changing angles to direct sunlight independent of our 24 hour axis rotation that gives us night and day. Simple, yet complex and let’s all life survive on our spaceship Earth. If our planet did not rotate, the dark side of the Earth away from the sun would be frozen solid at absolute zero and the sunny side would be burnt to a crisp as if someone had left the oven on all night and forgot about the bread baking! Black cinder buns anyone?
What exactly is the Equinox? Similar to the recent solar eclipse where the new moon passed in front of the sun for around two minutes, the sun passes over the equator as the Earth revolves and only ‘hovers’ at that spot for a brief moment. In September this movement of the sun over the Equator starts fall in the Northern Hemisphere and spring in the Southern Hemisphere. The reverse happens on March 21 every year.