Every six months, the equinox splits Earth's day almost in half ... Photograph by MASSOUD HOSSAINI / AFP, Getty Images View of the sun behind the Temple of the Seven Dolls in the Mayan ...

An equinox occurs when Earth's axis is titled perpendicular to ... Related: 32 stunning photos of auroras seen from space The northern lights occur when charged particles from the sun — called ...

Due to the recent fall equinox, the Earth may be more vulnerable to the ... the equinoxes than during the solstices. ISTOCK / GETTY IMAGES PLUS Astronomers hadn't expected sunspot AR3835 to ...

Earth has four seasons, but do other planets in our solar system also have hot summer days and cold winter nights?

This story was updated to add new information. Spring has sprung, bringing warmer days and blooming flowers. Thursday is the first day of spring, or the vernal equinox, in the Northern Hemisphere.

This happens twice a year, in March and in September, and is a result of Earth’s 23.5-degree tilt as it spins. During an equinox, places around the globe experience nearly equal periods of day ...

We watch as the Earth returns to life ... your friends can create a spring equinox altar in the middle of the circle. Place flowers and other mementos like photos or symbols of ancestors.

The first day of spring, or the vernal equinox, is determined by where the Earth is in its orbit around the sun. On this day, the Earth's axis is not tilted toward or away from the sun ...

During the equinox, the Earth’s axis and its orbit line up so that both hemispheres get an equal amount of sunlight. The word equinox comes from two Latin words meaning equal and night.

The autumnal equinox marks the start of fall every September. An equinox occurs, "two times of the year when the Earth's axis is tilted neither toward nor away from the sun, resulting in a "nearly ...

Meteorologists predict that Earth could be blasted by a geomagnetic storm on Wednesday due to its timing with the autumnal equinox. A coronal mass ejection — when plasma and magnetic particles ...