Learn what you could see in the night sky with no equipment from the Royal Observatory Greenwich; from galaxies and meteor showers to comets, star clusters, cloud formations and more

Join Royal Observatory astronomers and leading scientists at London's only Planetarium, featuring live planetarium shows, immersive science experiences and much more! Our shows are very popular, so we highly recommend booking tickets online in advance .

Awe-inspiring science, historic locations and stunning views combine at Royal Observatory Greenwich, making it an unmissable day out in London. Not sure where to start? Find out what to see at the Home of Greenwich Mean Time.

Out-of-this-world planetarium shows and live astronomy experiences for the whole family - visit London's only Planetarium at the Royal Observatory Greenwich

Learn what you could see in the night sky with no equipment from the Royal Observatory Greenwich; from galaxies and meteor showers to comets, star clusters, cloud formations and more

The Royal Observatory at Greenwich is the home of time and space, the Prime Meridian and Greenwich Mean Time (GMT). But have you ever stopped to ask what is the Prime Meridian and why it is in Greenwich? Why are all time zones across the world based on GMT? What is longitude and why is the meridian moving?

Royal Observatory Greenwich is Britain’s oldest purpose-built scientific institution. Founded in 1675, it is the birthplace of modern astronomy, and the home of Greenwich Mean Time and the Prime Meridian.

Home to the Royal Observatory and the historic Prime Meridian line, Greenwich blends scientific history, maritime heritage and world-class museums. Visit the place that gave Greenwich Mean Time to the world, and discover the best that London's historic royal borough has to offer.

Join us for The Sky Tonight, a live planetarium show presented by an astronomer from the Royal Observatory Greenwich. Explore the night sky as it will be on the day of your visit and learn about some astronomical sights you can spot for yourself in this classic show.

There's so much to see and do, including historic ship Cutty Sark and the Royal Observatory Greenwich, the vintage shops and street food of Greenwich Market, amazing exhibitions and planetarium shows, plus the free National Maritime Museum and Queen's House.