Search results
- Dictionaryau·tum·nal e·qui·nox
noun
- 1. the equinox in autumn, on about September 22 in the northern hemisphere and March 20 in the southern hemisphere.
Powered by Oxford Dictionaries
Jun 25, 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.
Sep 20, 2016 · Learn what an autumnal equinox is and how it marks the start of fall in the Northern Hemisphere. Discover how the sun's position affects the seasons, and explore other astronomical wonders in the sky this week.
Jul 9, 2024 · The autumnal equinox—the September equinox or the fall equinox—arrives on Sunday, September 22. Not only do temperatures drop, but plant life slows down, and so do we. Read about the first day of fall, plus some fun facts and folklore.
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. 10 facts about the September equinox. Equinox Local Time & Date.
According to the astronomical definition, fall begins with the autumnal equinox. In the Northern Hemisphere, it's the September equinox; south of the equator, it is the equinox in March. What is an equinox? Equinoxes and solstices in your city. Autumn Equinox, Northern Hemisphere (September) North America, Europe, most of Asia, Northern Africa.
Oct 19, 2023 · The September equinox is the autumnal equinox in the Northern Hemisphere and the vernal in the Southern. The Science of the Equinoxes. During the equinoxes, solar declination is 0°. Solar declination describes the latitude of Earth where the sun is directly overhead at noon. (The Equator, of course, is 0° latitude.)
Sep 22, 2020 · It occurs each September and marks the first day of fall. Find out the science behind the autumnal equinox and how it has been celebrated through the ages.
