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about autumnal equinox detailed information

When and What Is the September Equinox?

The September Equinox. There are two equinoxes every year ? in September and March ? when the sun shines directly on the equator and the length of day and night is nearly equal. (6 days ago)


An equinox is commonly regarded as the moment when the plane (extended indefinitely in all directions) of Earth's equator passes through the center of the Sun, which occurs twice each year: around 20 March and 22?23 September.In other words, it is the moment at which the center of the visible Sun is directly above the Equator.. However, because the Moon (and to a lesser extent the other (1 week ago)

? Fall Equinox

? Fall Equinox. Equinoxes are opposite on either side of the equator, so the autumnal (fall) equinox in the Northern Hemisphere is the spring (vernal) equinox in the Southern Hemisphere and vice versa. (5 days ago)

2019: The First Day of Fall | Facts

The arrives on Saturday, September 23, marking the official first day of fall. Here's everything you should know about the equinox?plus our favorite fall facts, folklore, photos, and more! (2 weeks ago)


Autumn, also known as fall in North American English, is one of the four temperate seasons.Autumn marks the transition from summer to winter, in September (Northern Hemisphere) or March (Southern Hemisphere), when the duration of daylight becomes noticeably shorter and the temperature cools down considerably. One of its main features is the shedding of leaves from deciduous trees. (4 days ago)


September 23 or 24 is Day, a national holiday. It's a day not just to mark the changing of seasons but also to pay our respects to our deceased parents, grandparents, and other family members. (5 days ago)

: What it means and how you can make the

The (the first day of autumn 2018) occurs on Sunday September 23 this year. The equinox happens when the equator passes the centre of the sun. This is when the north and south (3 months ago)

Earth's Seasons and Apsides

You can obtain the dates of the seasons (equinoxes and solstices) and apsides (perihelion and aphelion) of the orbit of the Earth by typing the year (1700-2100) in the space below and clicking on the "Find dates" button. (6 days ago)

Glossary of Terms: A

Measurement of atmospheric humidity.Absolute humidity is the mass of water vapor in a given volume of air (this measurement is not influenced by the mass of the air). Normally expressed in grams of water vapor per cubic meter of atmosphere at a specific temperature. (1 week ago)

Definition of Autumnal

of or characteristic of or occurring in autumn characteristic of late maturity verging on decline

Definition of Equinox

either of two times of the year when the sun crosses the plane of the earth s equator and day and night are of equal length; astronomy either of the two celestial points at which the celestial equator intersects the ecliptic