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Discover more from the Royal Observatory
2024 guide to the night sky
Find out what to see in the night sky in 2024 with the Royal Observatory's astronomy calendar
What's on at the Peter Harrison Planetarium
Out of this world stargazing and astronomy shows for the whole family
Astronomy courses
Discover our range of astronomy courses suitable for a range of individuals and experience
What is the Prime Meridian and why is it in Greenwich?
Why was Greenwich chosen as the home of the Prime Meridian and Greenwich Mean Time, and what do those terms mean?
Our collections: timekeeping
Find out more about our historic collection of clocks, watches and precision timekeepers
Space Live
Watch the biggest astronomical events live online with astronomers from the Royal Observatory Greenwich
History of the Great Equatorial Telescope
The Great Equatorial Telescope at the Royal Observatory kept Britain at the forefront of astrophysics and greatly expanded our knowledge of stars