In geography, the antipode () of any spot on Earth is the point on Earth's surface diametrically opposite to it; the antipodes of a region similarly represent the area opposite it.[note 1] A pair of points antipodal () to each other are situated such that a straight line connecting the two would pass through Earth's center. Such points are as far away from each other as possible, a great-circle distance of 10,800 nautical miles (20,000 km).
Antipodes - Video Learning - WizScience.com
In geography, the "antipodes" of any place on Earth is the point on the Earth's surface which is diametrically opposite to it. Two points that are "antipodal" to each ...