Kuwait astronomer Dr. Salih Al-Ajiri said that the astronomical season ends tomorrow, Wednesday, when the sun’s rays perpendicular to the equator, and with it the equanimity of night and day begins, or what is known as the autumnal equinox.
Al-Ajiri added to the Kuwait News Agency (KUNA) today, Tuesday, that the equating of night and day in Kuwait specifically will be on September 27, according to the calculation of the official calendar of the State of Kuwait, “Al-Ujairi Calendar”, as the manifestations of the autumn season begin in Kuwait significantly, and it is one of the shortest manifestations among the seasons of the year in Kuwait, especially when compared to the summer.
He explained that the equinox begins with the decrease in the angle of the sun’s rays to 60 degrees in the sky of Kuwait tomorrow, which is the period that is scientifically and astronomically called the autumnal equinox, where the number of hours of day and night are equal at the equator and the first days of autumn in the northern hemisphere.
He stated that the matter is slightly different in Kuwait due to the geographical location with regard to longitude and latitude, where the hours of night and day will be equal in Kuwait on the 27th of this month, as the sun will rise at that time at five and 39 in the morning and set at five and 39 in the evening.
He attributed the different seasons to the Earth’s rotation around the sun during the year in an orbit whose plane tilts on the Earth’s equator at an angle of 23.5 degrees, which is the same angle confined between the Earth’s rotation axis around itself and the axis of its rotation around the sun, the zodiac.
Al-Ajiri indicated that the four seasons are considered terms related to astronomy, as well as the tilt of the Earth’s rotation axis at the level of its orbit around the sun, which is classified in astronomy within the rotation of a celestial body around a star and the changes that occur to each of them.
He pointed out that the Earth’s rotation around the sun results in the transmission of its rays in an apparent movement relative to the Earth in the north and south directions, passing through the Earth’s equator, to reach the northern and southern ends of the planet during certain periods of time.
He added that during the Earth’s annual rotation around the sun, solar rays perpendicular to the equator twice a year, one of them at the beginning of spring (the vernal equinox) on March 20, and the second time at the beginning of autumn (the autumnal equinox) tomorrow.
He said that the sun’s rays deflect northward to perpendicular to the Tropic of Cancer at the beginning of summer on June 21, when the sun falls at the point of the “summer solstice” and also deflects south at the point of the winter solstice on December 22, when its rays perpendicular to the Tropic of Capricorn south of the equator.
Al-Ajiri indicated that in fact, there are two seasons on the globe at the same time. When summer comes in the northern hemisphere, winter comes in the other, and when spring arrives in one hemisphere, autumn comes in the other.
He stated that due to the different inclination of the solar rays falling at a location on the earth during a particular season of the year, the temperature on the globe varies, so temperatures, areas of depressions and atmospheric heights, and other climatic factors that result from the speed of wind and others differ from one region to another on the surface of the earth.