Chicagohenge is a stunning biannual event that happens during the spring and autumn equinoxes, when the sun aligns perfectly ...

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

The spring equinox marks the start of astronomical spring. The date is determined by the Earth's tilt on its axis as it ...

Read Illustration showing how Earth's tilt leads to the Northern and Southern Hemispheres receiving changing amounts of ...

As “Scientific American,” explains, “One of these days occurs a few days before the March equinox, and the other is a few days after the September equinox. These two times of year are aptly ...

Historical data shows that auroras occur more often during the spring and autumn equinox.

The spring equinox - also known as vernal equinox - marks the first day of spring in the northern hemisphere, according to ...

As the spring equinox approaches, northern lights hunters will scour the skies for breathtaking displays of color.

The spring equinox occurs every March 19, 20 or 21 in the Northern Hemisphere. Here's what happens during the celestial event ...

It is also one of two days of the year – the other is the day of the autumnal equinox in September – when the Earth's axis is tilted neither toward nor away from the sun, resulting in roughly ...