The 2026 vernal equinox was set to occur on March 20 at 10:46 a.m. EDT, marking the astronomical start of spring with nearly ...

However, twice a year—during the spring (vernal) and autumn (autumnal) equinoxes—the Earth’s axis is tilted neither toward nor away from the sun. Instead, the Earth sits "sideways" relative to the sun ...

The spring equinox 2026 marks the official start of spring in the Northern Hemisphere, bringing nearly equal daylight and ...

Earth has been dimming for decades, reflecting less light back into space—and the amount of light reflected by the Northern Hemisphere is decreasing more quickly than that of the Southern Hemisphere, ...

Geography students should be aware of the distinctions between the Northern and Southern Hemispheres. The equator separates the Earth into the Northern Hemisphere and the Southern Hemisphere.

An Iranian man jumps over a firework celebrating Chaharshanbe Souri, or Wednesday Feast, an ancient Festival of Fire on the eve of the last Wednesday of the Persian year, in Tehran, Iran, Tuesday.

A strip of cool water stretches west from South America along the equator, helping set the pace for some of the planet’s most important weather swings. That Pacific “cold tongue” helps steer the El ...

The Earth is reflecting less and less sunlight into space, especially in the Northern Hemisphere. The decline over the last 20 years is clearly measurable, as current NASA data shows. A research team ...

Friday brought us what we call “the first day of spring.” But announcing spring is an arbitrary declaration, as we saw by last week’s weather. The latest date I’ve seen snow flurries in our local ...

Earth will reach perihelion at 09:00 Universal Time on Saturday, January 4, 2025, the closest point to the sun in its annual, slightly elliptical orbit. The word comes from the Greek words peri (near) ...

Spring officially begins in the Northern Hemisphere on March 20 with the vernal equinox, when the world experiences equal amounts of daylight and darkness.