This phenomenon is due to Earth’s tilt, or axis, which never changes, staying at 23.4 degrees. ![]() ![]() The reverse happens in the Southern Hemisphere - as countries in that part of Earth experience their spring equinox, the days becoming longer. The autumnal equinox marks the beginning of the days becoming shorter in the Northern Hemisphere, as the sun is aligned more towards the South. Shutterstock What happens during a Fall Equinox? The tilt of the Earth with respect to the Sun during each equinox. The days become shorter until the Winter Solstice, when the Sun’s points more toward the Southern Hemisphere. The name equinox is derived from the Latin term aequus, meaning equal, and nox, meaning night. On the equinox, not only is the Sun aligned directly with the middle of the Earth, but the day and night are also of equal length. The celestial equator is the point in space that is directly above Earth’s equatorial line the invisible line marks the halfway point between the North and South poles. On September 22, the Earth will be at a point in its orbit around the Sun in which the Sun will be aligned with Earth’s celestial equator. It is no mystery that the Earth is in constant motion around the Sun. It will happen at the same point in time all across the Northern Hemisphere. This year the autumnal equinox will occur on Thursday, September 22 at 9:04 p.m., Eastern. The astronomical event of the Fall Equinox (or Spring Equinox for those in the Southern Hemisphere) happens at a certain time every year. ![]() That means fall is just around the corner, and it kicks off with the Fall Equinox - pumpkin spice enthusiasts and astronomers rejoice. The days are getting shorter and the temperatures cooler.
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