The Royal Observatory’s Onion dome is home to the Great Equatorial Telescope. Learn more about the largest telescope of its kind in the UK and visit the home of Greenwich Mean Time (GMT)! | Royal Museums Greenwich

The Royal Observatory, Cutty Sark, the Queen's House and National Maritime Museum - all these places remind us of Greenwich's unique history. But as well as our historic sites, there are many other stories from London's past waiting to be discovered here. Join us in uncovering 'forgotten' Greenwich, and uncover the hidden histories of this beautiful stretch of the River Thames. Guests: Louise Devoy - Senior Curator of the Royal Observatory, S.I. Martin - author and historian, Lara Maiklem - auth

🕰️ British Science Week kicked off yesterday, and with this year’s theme being ‘Time’, where better to get involved than the home of Greenwich Mean Time - the Royal Observatory? We’ve got an exciting array of events happening themed around time from now until 17 March including workshops, talks, tours, craft sessions and more. 🔴 To celebrate this exciting week in STEM, we’re taking a closer look at the striking red time ball on top of the Royal Observatory’s Flamsteed House. Our Curator of Tim

🏅2025 marks the 350th anniversary of the Royal Observatory, Greenwich. 🏅Historic home to Greenwich Mean Time and the Prime Meridian of the World, the Royal Observatory is one of the most important scientific sites in the world. 🏅We're proud to share that @royalmintuk are marking this historic anniversary with a beautiful new UK £2 coin! 🏅The coin pays tribute to the Royal Observatory with a reverse design that features the Shepherd Gate Clock, the constellation Ursa Minor, the star Polaris a