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Cooler days, longer nights aheadBy Helen FloresPhilippine Star
Filipinos can look forward to cooler days and longer nights as the earth reaches the “winter solstice,” the Philippine Atmospheric, Geophysical and Astronomical Services Administration (Pagasa) said yesterday.
In its astronomical diary for September, Pagasa said the winter solstice or equinox will start on Sept. 23.
In the northern hemisphere, winter solstice marks the beginning of a shift in the season from autumn to winter.
This date will mark the autumnal equinox in the northern hemisphere and the vernal equinox (vernal signifies “spring”) in the southern part.
Dr. Bernardo Soriano, chief of the Atmospheric, Geophysical and Space Sciences Branch (AGSSB) of Pagasa, said because the sun is positioned above the equator, day and night are about equal in length all over the world during the equinoxes.
Equinox means “equal night.”
According to Pagasa, during the winter solstice, the North Pole tilts away from the sun. Countries within the northern hemisphere could then observe that the sun stays low in the sky, which signifies that the days are shorter and the nights are longer and cooler.
Soriano said equinox happens twice a year. The last vernal equinox happened last March.
