The Origins of Fall

Fall is a season of vibrant colors, crisp air, and a sense of renewal. For many, it is the favorite time of year. Its origins are rooted in the Earth's celestial dance with the sun.

As the Earth orbits the sun, its tilt on its axis remains relatively constant. This tilt causes the sun's rays to strike different parts of the planet at varying angles throughout the year. During the summer months, the Northern Hemisphere tilts towards the sun, resulting in longer, more direct sunlight and warmer temperatures. During the winter, the Northern Hemisphere tilts away from the sun, leading to shorter, less direct sunlight and colder temperatures.

Fall marks the transition between these two extremes. As the Earth continues its journey around the sun, the Northern Hemisphere gradually tilts away from the sun. This shift in angle means that the sun's rays become less direct, causing temperatures to cool and the days to shorten. This gradual cooling and change in daylight hours signal the arrival of Fall.

The seasonal shift from summer to fall also has profound effects on the natural world. Trees, sensing the changing daylight hours and decreasing temperatures, begin to prepare for the upcoming winter. They withdraw chlorophyll, the pigment responsible for their green color, and reveal the underlying hues of yellow, orange, and red. This stunning display of autumn foliage is a testament to the intricate relationship between plants and their environment.

It's all about the tilt.