An equator is the imaginary great circle line that passes across a planet's centre, and that is aligned with the planet's direction of rotation. As such an equator is perpendicular with the planet's axis of rotation, and it divides the planet into two equal northern and southern hemispheres. For these qualities, the line of the equator may be defined also as the linear area on a planet whose relationship with the Sun remains more or less constant through out the year, that is, regardless of the planet's location as it orbits the sun in the ecliptic. Thus, where areas farther distanced from the equator go through different seasons throughout the year as they become more inclined toward or away from the sun; the areas immediately close to the line of the equator experience no or little changes in temperature and duration of day and night through out the year, and therewith have no seasons.

Other planets and spherical astronomical bodies have equators similarly defined. The length of Earth's Equator is roughly 40,075 kilometres (24,901 mi).

Read more about EquatorGeodesy of The Equator, Equatorial Seasons and Climate, Equatorial Countries and Territories, Crossing The Equator, Exact Length of The Equator, Climate

Other articles related to "equator":

Arthur Thomas Doodson - Results
... Bridgeport is north of the equator, so when the moon is north of the equator also and shining upon Bridgeport, Bridgeport is closer to its maximum effect than ... the heights of the high tides becomes smaller, until they are the same (the moon is above the equator), then redevelops but with the other polarity, waxing to a maximum difference and then waning again ... cycles between being north or south of the equator and as well the Earth - Sun and Earth - Moon distances change on their own cycles ...
Suzuki Equator
... The Suzuki Equator is a mid-size pickup truck based on the Nissan Frontier and assembled by Nissan ... The Equator is offered as either a four seat Extended Cab or a five seat Crew Cab ... In the Canadian market, the Equator is only offered in the Crew Cab configuration, in a single trim level ...
Equator - Climate
... Lowlands around the Equator generally have a tropical rainforest climate, also known as an equatorial climate, though cold currents cause some regions to have tropical monsoon climates with a dry season in the ...
Geography And Wealth
... The continents along the equator, Africa and South America, are the poorest ... effect can be seen, as the nations farthest from the equator are wealthier ... Within Asia, Indonesia, located on the equator, is among the poorest ...
The Equator Monument
... The Equator monument is located on the equator in Pontianak, Indonesia ... It marks the division between the northern and southern hemispheres ...

Famous quotes containing the word equator:

    The sea, washing the equator and the poles, offers its perilous aid, and the power and empire that follow it.... “Beware of me,” it says, “but if you can hold me, I am the key to all the lands.”
    Ralph Waldo Emerson (1803–1882)