Visit the Royal Observatory in Greenwich, London. Home of Greenwich Mean Time (GMT), the Prime Meridian of the world and London’s Planetarium.

Welcome back

The Royal Observatory is open! Visit the home of GMT, stand on the Prime Meridian line, and explore the historic home of British astronomy

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Beautifully precise

Hypnotising aren't they? The Harrison timekeepers are some of the most treasured objects in Royal Museums Greenwich – but why were these precise instruments made in the first place?

Learn more about the Harrison clocks

Find H4 in our collections

Plan your visit

Tickets and Opening

Adult: £16
Child: £8

Open daily


  • Greenwich Station
  • Cutty Sark DLR
  • Maze Hill Station
  • Greenwich Pier

Choose your tickets

Visitors must book their tickets online in advance. To see all our Planetarium shows and astronomy events click here.

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
  • Planetarium Shows
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