Astronomy and science come to life as you discover the past, present and future at the Royal Observatory Greenwich. 

One of the most important historical scientific sites in the world, stand astride the Prime Meridian with one foot in the East and one foot in the West at Longitude 0° in the Royal Observatory Greenwich.

Take a journey through the historic home of British astronomy and navigation, learn about Greenwich Mean Time, straddle the Prime Meridian, discover the Astronomers Royal, their stories as well as the original apartments in Flamsteed House. 

Head up the hill to the summit of Greenwich Park where the Royal Observatory offers an educational and entertaining visit back in time. Learn how time was standardised, how the first telescope was made and how science and astronomy has changed through the ages. Discover how the seas and the stars were first mapped out by scientific pioneers, explore iconic inventions such as the UK's largest refracting telescope, get hands-on with a 4.5 billion year-old asteroid, all while enjoying sweeping views across the River Thames and the whole of London. 


  • Straddle the Prime Meridian where the East and West hemispheres of the Earth meet at Longitude 0°
  • Time and Longitude Gallery - learn about the iconic timekeepers that pioneered solving the problem of finding longitude at sea. Explore exhibits such as John Harrison's sea watch
  • Explore the home of Greenwich Mean Time and be at the centre of time

Did You Know

  • The Royal Observatory was founded in the 1670s by King Charles II to further develop better naval navigation systems 
  • Greenwich has been marked at 0° Longitude since 1884
  • The Greenwich time ball, located on top of Flamsteed House was first used in 1833 for ships' captains to set their chronometers accurately before setting sail. The ball continues to drop at 13.00 everyday.

Using Your London Explorer Pass

Present your Explorer Pass at the admissions desks at the main entrance.

How to Get There

Cutty Sark (DLR line)

Greenwich and Maze Hill Stations (National Rail Network)

The London Explorer Pass is the best choice for maximum savings and flexibility. Choose to use your Explorer Pass at the Royal Observatory Greenwich, then look to the list of other top attractions for your other Explorer Pass admission choices!

Monday 10.00 - 17.00
Tuesday 10.00 - 17.00
Wednesday 10.00 - 17.00
Thursday 10.00 - 17.00
Friday 10.00 - 17.00
Saturday 10.00 - 17.00
Sunday 10.00 - 17.00
Last Admission: 16.30


Please check our Closure & Notices page for changings in opening hours and closure dates.

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Blackheath Avenue Greenwich SE10 8XJ (accesso tramite percorso in salita)


020 8312 6608