equinox
An equal day and night occurs twice per year on the summer and winter equinox.
Its the orientation of the earths rotational axis that defines the equinox, the axis remains parallel throughout the orbit of the sun, and when its side on to the sun (spring and autumn), thats the equinox (equal length of day and night).
If the Earth's axis was vertical - every point on its surface would have the same length of day and night, no matter what time of year it was. The tilt of the axis (to about 11 degrees) means that, as the Earth rotates, and travels around the sun, the length of day shortens and lengthens throughout the year.
The equinoxes are the two dates each year when the day and the night are of equal length.
Twice every year when night and day are of equal length.
they recieve more solar energy than the poles do
equinox
The time of year with equal time of night and day is the equinox.
Day and night are of equal length throughout the year at the equator.
An equal day and night occurs twice per year on the summer and winter equinox.
Occurs when the sun is directly above Earths equator
Equinox is the time of year when the day and night are equal, which occurs in March and September. They are known as the Vernal and Autumnal Equinoxes.
The equinox is when, twice each year, day and night are of equal length (about 22 September and 20 March).
By definition, one year.
Circumpolar Constellation
When the day and night are equal it is called the equinox (means literately equal night). It happens twice a year. Once in the sping called the vernal equinox which occurs on the March,20 or 21 each year. Once in the autumn or fall called the autumnal equinox which happens September, 21 - 22each year.
A year is based on the time it takes Earth to do one revolution or orbit of the sun.