"Equal Nights". On the equinoxes, March 21 and September 21, the tilt of the Earth and its orbit combine to put the apparent position of the Sun directly over the equator. At that point, the day and the night periods are equal.
"Equinox" comes from the Latin words for equal and night, because it describes the two times each year when day and night are of equal length as the sun crosses the celestial equator.
An equinox happens twice a year, when the tilt of the Earth's axis is inclined neither towards or away from the Sun, the centre of the Sun being in the same plane as the Earth's equator. The term "equinox" is derived from the Latin "aequus" (equal) and "nox" (night). Because around the equinox, day and night have an approximately-equal length.
liedlihqwlkhdaLDHLISHLSAD'S Equinoxes occur four times a year. The Vernal Equinox occurs in March, the Summer Solstice occurs in June, the Autumn Equinox occurs in September, and the Winter Solstice occurs in December.
The Autumn equinox.
The word is "equinoctial" = equal day and night. It occurs twice a year, on the first day of Spring, and the first day of Autumn.
Equinus
Latin
It comes from the Latin word for equal.
"Vernal" is Latin for "spring".
aequus (equal) + nox (night)
Equinox
It means Equal Night. Equi means equal, and Nox means night. That's waht it means in Latin.
"Equinox" comes from the Latin words for equal and night, because it describes the two times each year when day and night are of equal length as the sun crosses the celestial equator.
An equinox happens twice a year, when the tilt of the Earth's axis is inclined neither towards or away from the Sun, the centre of the Sun being in the same plane as the Earth's equator. The term "equinox" is derived from the Latin "aequus" (equal) and "nox" (night). Because around the equinox, day and night have an approximately-equal length.
The sun is at the celestial equator, appearing to go Northwards at the vernal equinox and southwards at the autumnal equinox. The word equinox derives from the Latin roots for "equal" and "night" and so, not surprisingly, the night time is the same as day time: 12 hours each.
liedlihqwlkhdaLDHLISHLSAD'S Equinoxes occur four times a year. The Vernal Equinox occurs in March, the Summer Solstice occurs in June, the Autumn Equinox occurs in September, and the Winter Solstice occurs in December.
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. "