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The Equinoxes. 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 sometime between March 19 and 21. The September equinox occurs sometime between September 21 and 24.
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Oct 19, 2023 · An equinox is an event in which a planet ’s subsolar point passes through its Equator. The equinoxes are the only time when both the Northern and Southern Hemispheres experience roughly equal amounts of daytime and nighttime. On Earth, there are two equinoxes every year: one around March 21 and another around September 22.
March 20, 2025. Satellite views of Earth on the solstices and equinoxes. We are at the March equinox now. Read more about this image. Images via NASA Earth Observatory. What is it? The March...
Mar 19, 2024 · This phenomenon is called an equinox, which comes from the Latin words "aequus" (equal) and "nox" (night). What causes an equinox? The Earth orbits the sun, at a tilt of about 23.5 degrees.
Sep 22, 2023 · The Northern Hemisphere’s spring — or vernal — equinox can land between March 19 and 21, depending on the year. Its fall – or autumnal — equinox can land between Sept. 21 and 24. WHAT IS THE SOLSTICE? The solstices mark the times during the year when the Earth is seeing its strongest tilt toward or away from the sun.
Apr 19, 2024 · autumnal equinox, two moments in the year when the Sun is exactly above the Equator and day and night are of equal length; also, either of the two points in the sky where the ecliptic (the Sun’s annual pathway) and the celestial equator intersect. In the Northern Hemisphere the autumnal equinox falls about September 22 or 23, as the Sun ...
Mar 15, 2024 · SCIENCE. Why the equinox ushers in the arrival of spring. Every six months, the equinox splits Earth's day almost in half. Here's how it happens—and why people have celebrated it since ancient...
