2009 marks the 125th anniversary of the official adoption of the Greenwich Meridian line as the prime meridian.The markers were erected by East Grinstead Town Council to celebrate the Millennium.

There are 24 time zones. There is an imaginary line running through the UK called the Prime Meridian. It runs through a place in London called Greenwich. The Prime Meridian splits the world into ...

Geographical coordinates are essential for identifying any point on Earth. This is possible, as is well known, thanks to a "network" of meridians and parallels. Among these, the Prime Meridian that ...

which is run by the Royal Observatory Greenwich in London—the home of Greenwich Mean Time and the Prime Meridian—attracted 4,000 entries this year from amateur and professional photographers ...