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ekuinoks

The equinoxes are times at which the center of the Sun is directly above the Earth's equator. The day and night would be of equal length at that time, if the Sun were a point and not a disc, and if there were no atmospheric refraction. Given the apparent disc of the Sun, and the Earth's atmospheric refraction, day and night actually become equal at a point within a few days of each equinox. The vernal equinox marks the beginning of spring in the northern hemisphere, and the autumnal equinox marks the beginning of autumn in the northern hemisphere.

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  • نوع المصطلح: اسم
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  • المجال / النطاق: فضاء
  • الفئة: رحلة الفضاء
  • Company: NASA
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ekuinoks i shtatorit
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One of two days during a year when the declination of the Sun is at the equator. The September equinox denotes the first day of fall in the Northern Hemisphere. In the Southern ...

ekuinoks pranveror
جغرافيا; جغرافية طبيعية

One of two days during the year when the declination of the Sun is at the equator. The vernal equinox denotes the first day of the spring season. For the Northern Hemisphere, the ...

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