The vernal equinox is all about the tilt of the Earth – not its distance from the sun.
Dr. Julia Caucino on preventative measures to take this allergy season.as the entire world experiences an equal day and night.
The start of spring depends on whether you're referring to the astronomical or the meteorological start. The Earth is tilted approximately 23.5 degrees off a vertical axis, and because of this tilt, the most direct sunlight is aimed at the Southern Hemisphere during our astronomical winter and at the Northern Hemisphere during our astronomical summer.The two solstices and two equinoxes are simply precise moments in time when the sun is in direct alignment with three distinct bands of latitude.
On the winter solstice in December, the sun's most direct rays are positioned over the Tropic of Capricorn . On June's summer solstice, the most direct rays of sunlight are in alignment with the Tropic of Cancer .
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