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The September equinox is the moment the Sun crosses the celestial equator—an imaginary line in the sky above Earth’s equator—from north to south. This happens on September 22, 23, or 24 in most years.
The September equinox (or southward equinox) is the moment when the Sun appears to cross the celestial equator, heading southward. Because of differences between the calendar year and the tropical year , the September equinox may occur from September 21 to 24.
Learn about the astronomical and cultural significance of the September equinox, which marks the start of fall in the Northern Hemisphere and spring in the Southern Hemisphere. Find out when and where it occurs, how it affects day and night, and what events and phenomena are related to it.
Learn how different cultures and religions celebrate the autumnal equinox, when day and night are nearly equal. Discover the myths, festivals, and traditions of Persephone, Mabon, Michaelmas, Higan, Moon Festival, and Navaratri.
Sep 24, 2011 · Learn about the September equinox, when the sun crosses the celestial equator from north to south. Find out when it happens, why it happens, and how to observe it in the sky and in nature.
Jun 25, 2024 · In the Northern Hemisphere the autumnal equinox falls about September 22 or 23, as the Sun crosses the celestial equator going south. In the Southern Hemisphere the equinox occurs on March 20 or 21, when the Sun moves north across the celestial equator. What causes the seasons?
Sep 20, 2016 · Learn about the autumn equinox, which marks the start of fall in the Northern Hemisphere and spring in the Southern Hemisphere. Discover how the sun's position affects the seasons, and explore some of the celestial wonders in the sky this week.
