There's so much to explore at Royal Observatory Greenwich, from historic objects, to cutting edge astronomy. 


1. Stand astride the historic Meridian Line

Stand with one foot in the west and one in the east at the Prime Meridian of the world. Learn all about Greenwich Mean Time (GMT) and how Greenwich came to be the home of time.

Don't forget to snap that important selfie and share it with us at #primemeridian.

2. Visit the world-famous Harrison Clocks

Learn about John Harrison’s epic race to solve the problem of Longitude and admire the craftsmanship of the world famous Harrison clocks, including H1, H2, H3 and H4.

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People watching planetarium show

3. Get to know the stars in the Peter Harrison Planetarium

Get up close and personal with the stars in one of our planetarium shows led by one of our expert astronomers.


4. Marvel at the Great Equatorial Telescope

Gaze in awe at one of the largest telescopes of its kind in the world. Learn about the telescopes past, and its time at the Royal Observatory since 1893. Admire the Onion Dome from the courtyard. 

5. Visit Flamsteed House

Explore where the Astronomers Royal lived and worked, as well as all about the families that supported them.

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6. Explore the Camera Obscura

Enjoy a unique moving panorama of London’s iconic buildings, including the River Thames and Old Royal Naval College. Learn about the history of the Camera Obscuras housed at the Royal Observatory since the 1700s.


7. Get astronomical in the Octagon Room

Visit the Christopher Wren designed Octagon Room, and examine the astronomical instruments on display. Learn about the story of the Astronomer Royal, and how they worked from this specially built room. 

8. Enjoy the best view in London

Sightsee from the best view in London, keeping an eye out for the London Eye and St. Paul's Cathedral. Take in the fresh air as a UNESCO heritage site rolls out in front of you. 

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9. Tell the time using the Shepherd clock

Accurately tell the time with this Shepherd Gate Clock, the first to ever show Greenwich Mean Time (GMT) to the public. 


10. Wonder at Airy’s Transit Circle

Visit the telescope that determined the exact location of the Prime Meridian

Choose your tickets

A father and son play on the Prime Meridian Line outside the historic Flamsteed House building of the Royal Observatory

Royal Observatory

  • Royal Observatory
  • Meridian Line
  • Free Museums
  • Planetarium Shows
  • Cutty Sark
Adult £16
Child £8
A brother and sister with their back to the camera look out from the viewpoint at the top of Greenwich Park towards historic Greenwich

Royal Museums Greenwich Day Pass

  • Two sites, one ticket
  • Cutty Sark
  • Royal Observatory
  • Guaranteed entry time
Adult £25
Child £12.50

Member tickets

  • Free entry
  • Priority booking
  • Membership card number required
Members go free
Advance booking essential
National Maritime Museum

Become a Member

  • Unlimited entry all year
  • Royal Observatory
  • Cutty Sark
  • Planetarium Shows
  • Special exhibitions
Direct Debit One-off
Individual: £50 Individual: £60
Family: from £65 Family: from £75