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, ...

Did you know both the astronomical first day of spring and Easter Sunday are tied to the spring equinox? How they relate, ...

The vernal equinox arrives on Thursday, marking the start of the spring season for the Northern Hemisphere and the fall in the Southern Hemisphere. On the equator, the sun will be directly overhead at ...

One of the most important consequences of Earth's axial tilt is the seasons. Seasons happen because the tilt points different parts of the planet toward the sun at different times 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 meteorological seasons are based on the annual temperature cycle and ...

(The extra quarter day is the reason why we have a 366 day leap year every four years.) The Earth’s axis is slightly tilted. This tilt gives us our seasons. The four seasons are spring ...

This year, the first day of astronomical spring ... which relate to the position of the earth. Meteorological seasons are based on annual temperature patterns and cycles, which is why each ...

The first day of meteorological spring is March 1, while the astronomical first day of spring varies based on the vernal equinox. Astronomical seasons depend on the Earth's position relative to ...

This year's first day of spring in ... which is also what causes the seasons, the National Weather Service explains. When the Earth tilts toward the sun, the hemisphere closest to the sun gets ...