What is the 'Vernal Equinox'?

Описание: At exactly 5:37 a.m. on Saturday, the annual celestial event called the vernal equinox marks the official start of spring in the Northern Hemisphere.

At that time on Saturday, the sun’s rays will equally impact Earth, meaning we will have roughly equal hours of daylight and nighttime. From that point through the first day of summer, or the summer solstice, there will be more daylight hours than night hours, due to the tilt of the Earth’s axis.

According to NASA, the equinoxes and solstices are caused by Earth’s tilt on its axis and ceaseless motion in orbit. Think of an equinox as happening on the imaginary dome of our sky, or as an event that happens in Earth’s orbit around the Sun.

In the Northern Hemisphere, the March equinox will bring us earlier sunrises, later sunsets, softer winds, and budding plants. With the opposite season, south of the equator, there will be later sunrises, earlier sunsets, chillier winds, and dry, falling leaves.

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