Its current designation on Earth dates back to 1884 when President Arthur assembled 41 delegates from 25 nations to establish a worldwide standard.
On Mars, this entity is defined by the crater Airy-0 (airy zero); on Venus, it is defined by the central peak in the crater Ariadne. Its current designation on Earth dates back to 1884 when President Arthur assembled 41 delegates from 25 nations to establish a worldwide standard. In the Northern Hemisphere, ground access to this location exists in the UK, France, Spain, Algeria, Mali, Burkina Faso, Togo, and Ghana, but there is none in the Southern  Hemisphere other than Antarctica. In conjunction with the International Date Line, this line divides the earth into the Eastern and Western hemispheres. Name this line that passes through the Royal Observatory in Greenwich, England.
On Mars, this entity is defined by the crater Airy-0 (airy zero); on Venus, it is defined by the central peak in the crater Ariadne.
Prime Meridian [or International Meridian; accept Greenwich Meridian before “Greenwich”; prompt on meridian]