September's new moon will be a special event this weekend, as it rises amid a partial solar eclipse — visible to only 0.2% of the world's population — and leads us all into the autumnal equinox. When ...

September could be a prime time to see vibrant auroras, thanks to a quirk of Earth's tilt that leads to more intense geomagnetic activity around the equinox. When you purchase through links on our ...

On the day of the 2025 autumnal equinox, the sun rises almost exactly due east and sets to the west. The months that follow will see cooler temperatures set in as the northern hemisphere receives less ...

There may be more northern lights – or aurora borealis – sightings this spring. As we near the spring equinox, also known as the vernal equinox, on March 20, the Earth's magnetic field and solar wind ...

Here's what happens as the direct rays of the sun slip south of the equator as the seasons change.