Arab Weather - We are approximately 12 days away from the end of summer and the beginning of autumn astronomically, as the summer solstice and astronomical summer began on Thursday, June 20, 2024, and ends with the beginning of autumn on Sunday, September 22.
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According to astronomical calculations, summer ends on Saturday, September 21, and autumn begins on Sunday, September 22, which will last for 89 days and 20 hours. Then winter begins on Saturday, December 21, and lasts for 88 days and 23 hours.
After the summer solstice, the sun begins to gradually move southward, and the inclination of its rays decreases until it reaches zero around September 23 (the autumnal equinox), when the sun's rays are perpendicular to the equator, and the length of day and night is equal throughout the globe. At this time, autumn occurs in the northern hemisphere, and spring in the southern hemisphere.
After the autumnal equinox, the Sun continues to move southward, and the inclination of its perpendicular rays to the Earth's surface decreases. Days become longer and nights shorter in the Southern Hemisphere, while the opposite occurs in the Northern Hemisphere. The Sun reaches an inclination of -23.5 degrees at the winter solstice on December 21, when its rays are perpendicular to the Tropic of Capricorn.
On the autumnal equinox, the sun rises perpendicular to the equator, causing the length of day and night on Earth to be equal. In the Northern Hemisphere, this corresponds to the vernal equinox in the Southern Hemisphere. After that, the length of the day begins to decrease gradually until it reaches its minimum on December 23, the date of the winter solstice, when the nights get longer and the days get shorter.
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