Essential Information

Type Family fun
Royal Observatory
Date and Times Weekends and holiday weekdays | Various times
Prices Free with admission to the Observatory

Free for Members. Not a member? Join now

Discover fascinating facts about the Universe, learn how to use a compass and discover the mysteries of time and space – all at the Royal Observatory in Greenwich!

Our live science, navigation and astronomy demonstrations are perfect for families, so everyone can discover more about the work, life and history of the Observatory.

These free drop-in sessions are included with entry to the Observatory, and take place regularly at weekends and throughout the school holidays.

Please note that our demonstration schedule varies throughout the year, and sessions are not guaranteed to run. Please check with staff on arrival

Solar observing

Observatory Unlocked

Enjoy a range of public talks and activities delivered by our Observatory Explainers, ranging from talks on the hidden stories of the Royal Observatory to Solar Observing and hands-on science demonstrations.

Our team of Observatory Explainers include those who are studying Astrophysics at degree or postgraduate level and can answer your burning questions about astronomy, from the origins of the Universe to the methods astronomers use to study the distant stars.

Suitable for ages 7+

Camera Obscura demo

Meridian Marvels

New dates to be announced soon.

Explore the stories of the families who lived in the Royal Observatory before joining us for some new interactive demonstrations outside in the Meridian Courtyard and Astronomer's Garden.

Maybe hear about the history of the Time Ball and see it drop at 1pm, learn a simple method for finding North, or enjoy the optical delights of our new model Camera Obscura.

Learn about the buildings and history of London as you gaze out over the stunning view, before stepping across to stand on the Prime Meridian line – one foot in the West and one in the East!

Suitable for all ages

A family poses for photographs on the Prime Meridian Line at the Royal Observatory Greenwich

Visit the Royal Observatory

Home of Greenwich Mean Time (GMT), the Prime Meridian of the world and London’s Planetarium

Choose your tickets

Observatory Unlocked is free with admission to the Royal Observatory.

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

Royal Observatory

  • Guaranteed entry time
  • Audio guide included
  • Planetarium shows not included
Adult £8
Child £4
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

  • Cutty Sark
  • Royal Observatory
  • Guaranteed entry time
  • Planetarium shows not included
Adult £20
Child £10
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

Member tickets

  • Free Museums entry
  • Priority booking
  • Membership card number required
Advance booking recommended