An equinox happens twice a year when the sun crosses the plane of the Earth's equator and day and night are of equal length.
the equinox is when the sun is directly above the equator
"Equi" comes from the word "equal"; "nox" means "night". So the "Equinox" means "equal nights", meaning that the length of the sunlit day is equal to the length of the night. This occurs when the Sun is directly over the equator.
This happens twice each year, around March 21 and September 21. (These dates can vary a day either way, depending on the cycle of leap years.)
They are the two times during the year, one in March and the other in September, when the sun passes directly over the equator. At these times periods of daylight and night time are of virtually the same length all over the globe, except for very near the poles.
An equinox is when the sun's apparent path is directly above the equator. The equinox that occurs in Spring occurs on either March 20th or 21st is called the vernal equinox. The equinox that occurs on either September 22nd or 23rd is the autumnal equinox. You'll note that the equinoxes herald either the first day of Spring or Fall, in the Northern Hemisphere and the reverse in the Southern Hemisphere.
It actually means this. Days when night and day is similar in length.
The equinox occurs two times every year. It is actually a single moment, and not a night or day and night in length. Imagine the tilted earth orbiting the sun. The equator defines a plane that extends for ever out into space. This equatorial plane moves a little like a plow, or a fan blade as you imagine it sweep from one solstice to the other, the north pole always pointing toward the pole star. When the earth reaches the point at the beginning of spring and again at the beginning of autumn where the center of the sun is on the earth's equatorial plane, that is the moment of the equinox. This is the moment when the sun is exactly over the equator. A more advanced concept is that the Vernal Equinox is also a location in the sky. This seems very strange until you get used to it. The sun is at a certain spot in the sky each year at the moment of the Vernal Equinox. That spot is often called "The Vernal Equinox". This location is space is useful for a few reasons. One problem is that because of various movements of the earth's orbit, this spot is slowly moving; it is not fixed along with the distant stars.
The equinox is the change of season from summer to winter. It is when the sun is located directly over the equator of the earth.
"Equi" is "equal"; "nox" means "night". So, the equinoxes are days when the length of the daylight is equal to the length of the night. This happens twice a year, about March 21 and September 21 each year, when the Sun passes directly over the equator. (The precise dates may be a day earlier or later, depending on the cycle of leap years.) The U.S. Naval Observatory's "Earth's Seasons" web site lists the precise times of the equinoxes, solstices, perihelion and aphelion each year.
An equinox occurs twice a year when the Sun is exactly above the equator and the day/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.
Types of Equinoxes
Equinox literally means "equal night" - the night and day have the same length everywhere on Earth at the equinoxes.
This occurs when the Sun is directly over the equator, which is generally March 21 and September 21 (although these can vary a day or so either way depending on the cycle of leap years).
(Discussion of the answer moved to the Discussion page.)
The equinox is the moment (not a day) when the sun is exactly above the equator. It is popularly thought of as the time when the period of daylight is equal to the period of nighttime.
The equinoxes are two points on the map of the stars, located on the line that the sun
appears to travel through the stars during the course of the year.
Technically, those are the points where the sun's path crosses the celestial equator,
where the sun appears to be equal distances from the points in the sky to which the
Earth's north and south poles point.
When the sun appears to be there, it's overhead on the Earth's equator, and daylight
and darkness are (roughly) equal length everywhere on Earth.
The sun reaches those points on March 21 and roughly September 21.
The March equinox is the beginning of Spring in the northern hemisphere and
Autumn in the southern. The September equinox is the beginning of Spring in
the Southern Hemisphere and Autumn in the northern.
Equinox is referring to the date or the time that the sun crosses the celestial equator. Equinox is twice a year wherein the daytime and night has the same duration.
Days and nights are equal in length everywhere.
The point at which the sun is closest to the earth in its eliptical orbit.
it is 521.68 equinox
The Sun is directly overhead the equator two times per year, known as the Equinoxes. In the northern hemisphere, the Spring Equinox occurs on March 20 and the Fall Equinox occurs on September 22.
Equinox
On March 20 for the Northern Hemisphere (this is the autumnal equinox in the Southern Hemisphere). The vernal equinox for the Southern Hemisphere will be either September 22 or 23.
Because that's how the weather happens to be on that particular vernal equinox. There is no correlation with wind.
The autumnal equinox is also known as the fall equinox and the September equinox. An example of a sentence using "autumnal equinox" is "This year's autumnal equinox falls on a full moon. "
Spring equinox occurs around March 20 and Fall equinox occurs around September 22 for the Northern Hemisphere. For the Southern Hemisphere these dates are opposite; the Spring equinox is around September 22 and the Fall equinox occurs around March 20.
No. Equinox is a noun.
The Autumn equinox.
The spring equinox is March 21, The fall equinox is September 23
The vernal equinox is also known as the spring equinox.
the march equinox
A synonym of equinox is aphelion.
the spring equinox is in spring.
it is 521.68 equinox
There is an equiniox twice a year. There is an equinox in March. There is an equinox in September.
I like equinox. The Vernal Equinox is nearly upon us.