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EVENTTHIS WEEKENDFREE

Observatory Unlocked

Royal Observatory Greenwich · London10 Oct 2026 - 17 Jan 2027
An adult and young child play together on a cobbled courtyard in front of the Royal Observatory's distinctive brick buildings with domed towers.
OCT 202610WEEKENDS
Courtesy of Royal Observatory Greenwich
Historic red brick building with twin domed towers topped with a cross and red sphere, set against blue sky.
This is a photograph, not a designed graphic.

Small black corrugated-iron chapel with a cross on its roof, set in an Icelandic moorland landscape under a glowing green northern lights sky.

DATES

10 Oct 2026 - 17 Jan 2027

TIMES

Check with the venue

PRICE

Free

Drop by the Royal Observatory to chat with Explainers about science and astronomy, no booking needed.

Observatory Unlocked is an informal drop-in where Royal Observatory Explainers are on hand to talk through science and astronomy topics, answer questions and bring the subject to life. It runs on Saturdays and Sundays at the Royal Observatory in Greenwich and is included with your entry ticket to the Observatory, so there's nothing extra to book or pay. It suits anyone visiting the Observatory who fancies a chat with an expert alongside seeing the Prime Meridian Line and the Great Equatorial Telescope, whether you have questions about the night sky, space missions or the history of astronomy at Greenwich.

Happening at

An adult and young child play together on a cobbled courtyard in front of the Royal Observatory's distinctive brick buildings with domed towers.Royal Observatory GreenwichPrime Meridian, planetarium and telescopes above Greenwich Park - book ahead for school holidays.London · from £12 · booking required · gift shop · food on siteSee full listing →

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Observatory Unlocked at Royal Observatory Greenwich