Emergency Nurse Practitioner (ENP) Practice Test

The prime meridian, which is an imaginary line used as the zero point for measuring longitude, runs through Greenwich, London. This is the internationally recognized location of the prime meridian, and it was established in 1884 at the International Meridian Conference. The other options, Paris, France; Rome, Italy; and Sydney, Australia, are all major cities but they are not known for being the location of the prime meridian. Additionally, the prime meridian runs through Greenwich because this was the location of the Royal Observatory, which was responsible for keeping track of time and mapping, making it a fitting location for the starting point of longitude measurement.