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 ...

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

The vernal equinox heralds the arrival of spring in the Northern Hemisphere (finally). But have you heard the myth about balancing an egg on its end?

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

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

At the time of the equinoxes, the sun appears to move from one hemisphere to the other. The vernal equinox in March is when ...

One of this month's skywatching highlights is a total lunar eclipse on the night of March 13 — or more precisely, on the morning of the 14th when the Earth gets between the moon and the sun, and we ...

Neither the vernal equinox nor the calendar have any direct relationship to Houston’s weather, and Mother Nature has a habit ...

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