What Is Fall Season -

Astronomically, autumn begins with the autumnal equinox, usually occurring around September 22nd or 23rd in the Northern Hemisphere. During the equinox, the Sun crosses the celestial equator, resulting in nearly equal durations of day and night across the planet. Following this point, the Earth's tilt—specifically 23.5 degrees relative to its orbital plane—causes the Northern Hemisphere to tilt progressively away from the Sun. This reduction in solar insolation is the primary driver of the season's cooling temperatures.

The most visible definition of fall lies in its impact on the biosphere. As daylight hours decrease and temperatures drop, ecosystems undergo a process of preparation for winter dormancy. what is fall season

This is fall’s most magical trick. During summer, leaves are green because they are full of , a chemical that captures sunlight for photosynthesis. As days get shorter and temperatures drop, trees get a signal to prepare for winter. They stop producing chlorophyll, and the green fades away. This reveals other pigments that were always hidden in the leaf: This reduction in solar insolation is the primary

The fall season, also known as autumn, is the third of the four seasons in the year, typically lasting from September to November in the Northern Hemisphere and from March to May in the Southern Hemisphere. During this period, the days get shorter, the weather gets cooler, and the leaves change color, creating a picturesque landscape. Fall is a season of transition, a time when nature prepares for the cold winter months ahead, and it is also a season of great beauty, filled with vibrant colors, exciting activities, and a sense of coziness. This is fall’s most magical trick

To understand what autumn is , one must first define when it occurs. There are two primary definitions used today: astronomical and meteorological.