What does «línea equinoccial» mean in Spanish?
- Geog. Another name for the Earth's equator, the Earth's great circle perpendicular to the pole line. On Earth, the equator is about 40,075 km (24,901 miles) long, 78.8% of which is over water and 21.3% over land. The latitude of the Earth's equator is, by definition, 0° (zero degrees) of arc. The equator is one of five notable circles of latitude on Earth; the other four are both polar circles (the Arctic Circle and the Antarctic Circle) and both tropical circles (the Tropic of Cancer and the Tropic of Capricorn). The equator is the only line of latitude that is also a great circle, that is, one whose plane passes through the center of the globe. The plane of the Earth's equator, when projected outward from the celestial sphere, defines the celestial equator.