This year marks 350 years since The Royal Observatory in Greenwich was founded. Take a look at five astronomically great facts about the world-famous institution that are out of this world. The ...

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.

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 ...