Search results
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.
Equal day and night? It can also happen in June! Fall 2024 and 2025 Dates. 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.
Sep 23, 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.
Sep 12, 2024 · The autumnal equinox (as well as spring equinox) is the moment when neither of the Earth’s hemispheres is inclined towards or away from the Sun. When is it? In the Northern Hemisphere, the closest autumnal equinox will take place on September 22, 2024, at 12:44 GMT (08:44 a.m. EDT).
Sep 15, 2024 · While meteorologists like to call fall at the beginning of September, astronomical autumn starts later, on the autumnal equinox. This year, it falls on Sunday, Sept. 22 at 8:44 a.m. EDT...
Sep 18, 2017 · The 2024 fall equinox—also called the autumn equinox—takes place on Sunday, September 22, 2024. The fall equinox is not on the same day each year, though it always falls between September 21...
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.
Sep 6, 2024 · Normally, the autumn equinox falls between 22 and 24 September, and this year the equinox occurs on 22 September at 13:44 BST.
Sep 22, 2024 · The autumnal equinox brings fall to the Northern Hemisphere today as the sun passes directly over the equator at noon. But are day and night actually equal length today?
The autumnal equinox occurs in September each year, and in the northern hemisphere the date marks the end of summer and beginning of autumn. Reasons for the Seasons. The Earth is tilted on its axis. This means that the Sun illuminates the northern or southern hemisphere more depending on where the Earth is along its orbit.
