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When is the autumnal equinox?
What is the equinox in the southern hemisphere?
What is September equinox?
When does the equinox fall?
Jun 25, 2024 · Learn about the autumnal equinox, when the Sun crosses the celestial equator and day and night are equal in length. Find out when it occurs in the Northern and Southern Hemispheres, and how it marks the beginning of autumn.
- The Editors of Encyclopaedia Britannica
Find out when the fall equinox or autumnal equinox is in 2024 for both hemispheres, and how it marks the start of the season. Learn about the astronomical, meteorological and cultural aspects of fall, and how it relates to the Earth's tilt and orbit.
Jan 24, 2024 · Learn about the autumnal equinox, an astronomical event that marks the start of autumn in the Northern Hemisphere. Find out when it occurs, how it affects the weather, foliage, and the Harvest Moon, and more.
In the Northern Hemisphere, the March equinox is also known as the spring or vernal equinox; the September equinox can be called the fall or autumnal equinox. In the Southern Hemisphere, the names are the other way around.
The March and September equinoxes mark the beginning of the spring and autumn seasons on Earth, according to one definition. The equinox in September is the start of fall in the Northern Hemisphere and the beginning of spring south of the equator.
Sep 20, 2016 · Learn about the astronomical phenomenon of equinox, which marks the start of fall in the Northern Hemisphere and spring in the Southern Hemisphere. Discover how to observe Saturn, the moon, and star clusters in the night sky around the autumn equinox.
The equinox may be taken to mark the end of astronomical summer and the beginning of astronomical autumn (autumnal equinox) in the Northern Hemisphere, while marking the end of astronomical winter and the start of astronomical spring (vernal equinox) in the Southern Hemisphere.
