the Autumnal #Equinox occurred here in Los Angeles on Monday, September 22, 2014 at 7:29pm
There are two equinoxes every year – in September and March – when the sun shines directly on the equator and the length of day and night is nearly equal.
The Earth's axis is always tilted at an angle of about 23.5° in relation to the ecliptic, the imaginary plane created by the Earth's path around the Sun. However, the tilt's orientation changes throughout the year. On any other day of the year, the Earth's axis tilts a little away from or towards the Sun. But on the two equinoxes, the Earth's axis tilts neither away from nor towards the Sun and is perpendicular to the Sun's rays, like the illustration shows.
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