As the Northern Hemisphere welcomes spring today, the Southern Hemisphere is marked with the first day of autumn.

Ready for the first day of spring? What we know about the 2025 spring equinox, the autumnal equinox, summer and winter solstices and more.

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

On both equinoxes, the sun is exactly above the equator. Once the Earth hits its vernal equinox, the Northern Hemisphere moves into spring and the Southern Hemisphere moves into fall. The Earth ...

On the equator, the sun will be directly overhead at noon. Equinoxes are the only time when both the north and south poles are lit by sunshine at the same time. The events have been marked and ...

As sunspots emerge on the sun's surface close to its equator, their orientations will ... triggering strong geomagnetic storms on Earth, which, in turn, have produced some incredible auroral ...