An equinox is equivalently defined as the time when the plane of Earth's equator passes through the geometric center of the Sun 's disk. [7][8] This is also the moment when Earth's rotation axis is …

Equinox descends from aequus, the Latin word for "equal" or "even," and nox, the Latin word for "night"—a fitting history for a word that describes days of the year when the daytime and nighttime …

Mar 19, 2026 · Equinox, either of the two moments in the year when the Sun is exactly above the Equator; also, either of the two points in the sky where the ecliptic (the Sun’s annual pathway) and …

Sep 4, 2024 · The equinox marks a significant astronomical event that occurs twice a year, signaling a moment of balance between day and night across the globe. It is when Earth’s tilt perfectly aligns …

Mar 20, 2026 · The 2026 spring equinox arrives Friday, March 20, marking the astronomical beginning of spring in the Northern Hemisphere. This guide explains the precise timing across time zones, the …

Mar 14, 2026 · The equinox marks the exact moment when the center of the Sun crosses the plane of our planet’s equator. The day of an equinox, observers at the equator will see the Sun directly …

There are only two moments each year when neither pole points toward the Sun, and the Sun lies directly above Earth’s equator. These moments are the equinoxes. The March equinox happens …

EQUINOX definition: the time when the sun crosses the plane of the earth's equator, making night and day of approximately equal length all over the earth and occurring about March 21 vernal equinox, or …

/ ˈi·kwəˌnɑks, ˈek·wə- / Add to word list either of the two times during the year when the sun crosses the equator and day and night are of equal length, about March 21st and September 23rd (Definition of …

Mar 19, 2026 · An equinox is a moment of time when the Earth’s axis is tilted neither toward nor away from the Sun, making day and night (almost) equal across the world. Our planet’s axis of rotation is …