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The Philippines will start to experience longer nights and shorter days after the autumnal equinox on Wed afternoon, Sep 23.
According to the Philippine Atmospheric, Geophysical and Astronomical Services Administration (PAGASA), an autumnal equinox will occur at 4:20 p.m., when the sun will line up directly above the Earth’s equator, and day and night will have equal length on Earth.
The term equinox is derived from the Latin words “aequus” and “nox” which mean equal and night, respectively.
“Autumnal equinox will occur on September 23 when day and night will have equal length on Earth. Hence, thereafter, Philippine nights will be longer as the Sun moves below the celestial equator towards the southern hemisphere,” PAGASA said.
Last March 21, the sun reached the vernal equinox, making night and day also equal in length.
After the vernal equinox, which marked the beginning of spring in the northern hemisphere and autumn in the southern hemisphere, daylight hours became longer.
Photo: MorgueFile
This article has been re-published with permission from ABS-CBNnews.com.
