Explanation:
The celestial sphere's great circle, whose plane is perpendicular to the earth's axis. 2: a large circle of the globe or a celestial body that divides the earth's surface into the northern and southern hemispheres and is equally distant from both poles.An equator is an imaginary line that circles a planet or other celestial body in the centre. At 0 degrees latitude, it is midway between the North Pole and the South Pole. The world is divided into two halves by an equator: the Northern Hemisphere and the Southern Hemisphere. At the Equator, the Earth is the widest.
