Thursday is the first day of spring, or the vernal equinox, in the Northern Hemisphere. During an equinox, the center of the ...

Thursday, March 20 marked the beginning of spring with the vernal equinox, but what does this really mean? To understand, let ...

Equinoxes mark the only time of the year when both the north and south poles are lit by the Sun at the same time. The spring ...

An equinox happens when the sun's rays are directly over the equator, resulting in approximately equal hours of daylight and darkness worldwide. The summer solstice, the longest day of the year ...

The difference is because the astronomical seasons are based on the position of the Earth in relation to the sun, whereas the ...