Tomorrow, Sunday, is the beginning of the astronomical fall season.

Arab Weather - Dr. Ammar Sakaji, head of the Jordanian Astronomical Society, said that the moment of the autumnal equinox according to Jordanian time occurs at 3:43 pm on Sunday, September 22, 2024, which means the end of summer astronomically and the beginning of autumn astronomically, as is known, that the moment of the autumnal equinox occurs in the northern hemisphere of the Earth and at the same time the moment of the vernal equinox occurs in the southern hemisphere of the Earth, meaning that the two equinoxes occur at the same moment on planet Earth, taking into account the different geographical locations and time and timing differences.

The most prominent astronomical phenomena on the day of the autumnal equinox

The sun will appear at the moment of the autumnal equinox above the equator, meaning that the sun's rays are perpendicular to the equator, which represents the zero degree of latitude, and solar radiation is distributed almost equally in both hemispheres of the Earth. At this moment, the Earth's axis of rotation is directly perpendicular to the sun-earth line, and does not tilt toward or away from the sun. The length of the shadow on the equator is at its minimum, and the sun rises from the geographic east point and sets from the geographic west point, and the hours of daylight and night are almost equal without taking into account the effect of the atmosphere.

Due to the physics of the atmosphere, from the phenomena of the interaction of light with the components of the atmosphere, such as refraction, reflection, dispersion, polarization, absorption and emission, there is a delay in the day of equal hours of night and day. The time difference between the moment of the autumnal equinox and the equal hours of night and day was calculated for the geographical location of Jordan and it was found to be equal to four days, i.e. it is several days later than the moment of the equinox. This means that Thursday, September 26, 2024 is the day on which the hours of night and day are equal for the Jordanian capital, Amman, and its suburbs.

How long is the fall season?

Answer: Astronomically, the fall season continues until the winter solstice at 12:20 noon on Saturday, December 21, 2024, which is approximately 89 days, 20 hours, and 37 minutes.

See also:

Jordan's sky is set to witness a giant, partially eclipsed moon

Jordanian Astronomical Society: Joint observation of the Safar crescent from the Al-Aalouk Mountains north of the Jordanian capital, Amman