Happy Fall! In case you did not notice, the nights are getting cooler and the days are becoming a little shorter in the Northern Hemisphere. Today is officially the First Day of Fall in the region north of the Tropic of Cancer.
But what makes today officially the first day of Fall? Our earth has a 23 degrees tilt and orbits around its axis. At two instances during one revolution of the earth around the sun (March 20/21 – Spring or Vernal equinox and Sept 22/23 – Autumnal equinox), the tilt of the earth’s axis is neither towards nor away from the sun. The sun is directly overhead at the equator, resulting in roughly a 12-hour day and an equal night.The term “equinox” comes from the Latin word aequus (meaning equal) and nox (meaning night), because around equinox the length of the day and night is roughly equal everywhere on earth.
Along with the cooler weather other natural processes can also be witnessed. As trees and plants begin to receive less sunlight, they begin to produce lesser and lesser chlorophyll (the green color of the leaves) and cause leaves to fall off. Animals sense the change in weather and feverishly gather food for a long period of scarcity. Many prepare to spend the cold winter months either hibernating or migrate to warmer locations. Don't forget to observe all the changes around you with every passing season.