What does zero degrees longitude refer to?

Answer 1

Zero degrees longitude is any point on the imaginary line between the north and

south poles that goes through a neighborhood just outside London. The line is

called the Prime Meridian, and all longitudes on Earth are referred to it.

The terms "near east" for Africa, "Middle East" for the Arabian Peninsula, "far east"

for China and the orient, and "west" for the US and Canada, are all in relation to the

Prime Meridian.

Answer 2

Zero degrees longitude refers to the Prime Meridian, which is an imaginary line that runs from the North Pole to the South Pole and acts as the starting point for measuring longitude. It passes through the Royal Observatory in Greenwich, London, and is used as the reference point for establishing time zones and coordinating worldwide navigation systems.