AMMAN — On Sunday, President of the Jordanian Astronomical
Society (JAS), Ammar Al-Sakaji announced that the vernal equinox in the
northern hemisphere is set to occur at 6:06am next Wednesday, March 20.
اضافة اعلان
At that moment, Sakaji stated that the sun's rays will align
with the Earth's equatorial line, causing shadows to disappear at noon in those
areas of the Earth, adding that this event coincides with the occurrence of the
autumnal equinox in the southern hemisphere of the Earth, Al-Ghad reported.
Sakaji indicated that in Jordan, due to its geographical
location, day and night hours are nearly equal on the equinox day, observed
last Saturday, with each lasting approximately 12 hours. He noted that the sun
rises at 6:44am and sets at 6:45pm, moving from the geographic east to the
geographic west in Jordan on Tuesday, March 19.
Explaining the inequality in day and night hours, Sakaji
attributed it to ‘atmospheric physics such as scattering and refraction, and
the distance from the equator,’ in addition to altitude above sea level. He
highlighted that the sun's disc is an extended body and not a point of light,
and refraction of sunlight in the atmosphere causes the apparent delay in its
sunrise and sunset times, thereby increasing the length of the day.
Sakaji further noted that the Earth's rotation around the
sun on an inclined axis, with the tilt angle being 23.5 degrees, is the reason
for the occurrence of the four seasons.
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