At 10:01 GMT this morning, something happened that has been happening for 4.5 billion years, and yet remains quietly astonishing: Earth arrived at the precise point in its orbit where neither pole ...

The Fall Equinox marks the official start of autumn in the Northern Hemisphere, representing a key shift in Earth’s relationship with the Sun. While it is often linked to equal day and night, the ...

For the second time in 2025, an incredible astronomical event is about to change the seasons on Earth. The September equinox is almost upon us, with autumn about to begin in the Northern Hemisphere, ...

Add Yahoo as a preferred source to see more of our stories on Google. The autumnal equinox doesn't just mark a seasonal shift, but also increases the chances of dazzling auroras thanks to the Earth's ...

The autumnal equinox is upon us Sunday, and with it a shift to shorter days, longer nights and the astronomical start of fall in the Northern Hemisphere. Equinoxes occur when Earth reaches a point in ...

The geometry of the equinox can mean an uptick in the intensity of the geomagnetic storms that cause aurora. At exactly 08:43 EDT on Sunday, September 22, 2024, the sun will cross the celestial ...

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A NASA and NOAA weather satellite captured this image of an autumnal equinox in 2019. Are you ready for fall? The official arrival of fall is the autumnal equinox, which occurs in the Northern ...

If you’re hoping for an early spring this year, you’re in luck. Not only did the groundhog correctly predict an early spring, but the season also begins a day early on the calendar. The vernal equinox ...

Spring is almost here — officially, at least. The vernal equinox arrives on Tuesday, marking the start of the spring season for the Northern Hemisphere. But what does that actually mean? Here's what ...