The home of GMT
Visitor Notice: The Planetarium will be closed April 1 - April 7 for essential maintanance. Tickets may be available for the weekend April 6 - 7 in person on the day. The rest of the Royal Observatory is open as usual. Book tickets your tickets today.
Visit the Royal Observatory in Greenwich, London. Home of Greenwich Mean Time (GMT), the Prime Meridian of the world and London’s Planetarium.
Explore the fascinating mysteries of time and space
Make the most of your trip
Download our essential guide to the very best things to do and see at the Royal Observatory Greenwich.
Royal Observatory Greenwich is a quick and easy journey from central London, by DLR, rail or boat