Those would be the "equinoxes".
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At the intersection of the Prime Meridian and Equator. Middle of the Atlantic Ocean I think.
The earth has a northern hemisphere and a southern hemisphere. The dividing line between these two halves of the globe is the Equator. Parallel to the Equator are lines of Latitude. These are measured in degrees north or south of the equator. The expression, "North of 60." refers to a position or area on the Earth that is north of the 60° line of latitude. Countries such Greenland, Iceland and Finland are completely North of 60°. Most of Alaska, Norway and Sweden are in this zone and about half of Canada and Russia. The Arctic continent is substantially beyond 60° north.
In the context of satellites, the inclination angle is the angle between the equator and the polar orbit. The polar satellite has high angle of 90 Deg and the Geo SAT has angle of 0 Deg
It iz kalled the equator
A meter is a measure of length, not area. The equator is approximately 40,000,000 m long, so one meter is 1 forty millionth of the equator.