The vernal equinox arrives on Thursday, marking the start of the spring season for the Northern Hemisphere and the fall in ...

When the Earth tilts toward the sun, the hemisphere closest to the ... The equinoxes occur when the sun is right above the equator, making day and night equally long. The solstices occur on ...

Thursday is the first day of spring, or the vernal equinox, in the Northern Hemisphere. During an equinox, the center of the sun is on the same plane as the equator. After the vernal equinox in March, ...

Day and night aren't exactly 12 hours on the ... A solstice is the moment the Earth's tilt toward or away from the sun is at a maximum, according to the National Weather Service.

Earth's rotation causes day and night, but the revolution (or orbit) of Earth around the sun, combined with the tilt of the Earth's axis, is what causes seasons. "Seasons are caused by the fact ...