The Greenwich Meridian (Prime Meridian or Longitude 0° 0' 0" degrees) marks the starting point of every time zone in the World. GMT is Greenwich Mean Time is the mean (average) time that the earth takes to rotate from noon-to-noon. GMT sets current time or official time around the World.
The Zero longitude – Prime Meridian lines are represented by Stainless steel strips in the observatory courtyard. In the night time, a strong laser beam is projected from the observatory to mark the Meridian lines. The lines divide the East and West part of the globe and defines longitude for every country/region.
See my fingers pointing at the longitude of Bombay - 72° 50' EAST engraved on the Meridian lines.
The Royal Observatory and Museum are fantastic and the surrounding park is lovely. You can have a bit of a science lesson if you like and learn about Greeenwich Mean Time and the history of timekeeping…. Definitely an important and great journey in my history.
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