what does equator  mean
The Equator usually refers to the Earth's equator: an imaginary line on the Earth's surface equidistant from the North Pole and South Pole, dividing the Earth into the Northern Hemisphere and Southern Hemisphere. Other planets and astronomical bodies have equators similarly defined.
The latitude of the Earth's equator is by definition 0Â° (zero degrees) of arc. The Equator is one of the five notable circles of latitude on Earth; the other four are the two Polar Circles: the Arctic Circle and the Antarctic Circle; and the two Tropical Circles: the Tropic of Cancer and the Tropic of Capricorn.