Written by Mahmoud Ragheb
Friday, June 16, 2023 05:53 PM
Dr. Zad al-Qadi, Chairman National Institute for Astronomical Research and head of the Arab Society for Geophysics, and Astronomy and Space Sciences, according to astronomical calculations carried out by the Institute Sun Research Laboratory, this year’s 2023 AD summer solstice will occur on Wednesday at 5:59 p.m. Cairo Summer Time. , June 21, and the length of summer season this year is 93 1 day 13 hours 52 minutes.
Dr. Yasser Abdel-Hadi, head of the Sun Research Laboratory, said in a statement to the company that the Sun rotates in an apparent orbit relative to the stars of the celestial background that appear fixed in the sky and 27 minutes, the same angle that the Earth’s axis of rotation is tilted from vertical to the plane of its orbit, and the Earth rotates around the Sun on its axis and its orbit. The angle resulting from the inclination of its axis in the level, results in the four seasons.
After the vernal equinox, the Sun’s apparent motion continues gradually northward of the equator, and the course of the Sun’s rays continues to increase, so the length of the day gradually increases and the length of the night decreases. The opposite occurs in the Southern Hemisphere until the Sun’s rays become perfectly perpendicular 23 degrees and a half north of the Tropic of Cancer. On June 21 (summer solstice), summer occurs in the Northern Hemisphere, and winter occurs in the Southern Hemisphere. .
On the day of the summer solstice, June 21, the length of the day in the Northern Hemisphere is at its maximum, and on this day between 47 degrees and 66 degrees latitude, evening twilight is combined with morning twilight. The nights in this case are called “white nights”. Also, on this day, the sun does not set in relation to places located in the northern frozen region at 66 degrees or more north latitude, and the day lasts. 24 hours, and this event is called the event of the midnight sun)) At the same time the sun does not rise in relation to places located in the southern frozen region, latitude 66 degrees or more south, the night prevails for 24 hours , and occurs during the opposite winter solstice.
