Observatory Unlocked
Price
Free
Included with entry to the Royal Observatory. Free entry for Members.
About
Drop-in weekend science demonstrations and astronomy sessions with the Royal Observatory's Observatory Explainers, included with entry.
Get hands-on with a telescope, explore the surface of the Moon, try your hand at using a sextant and see the invisible at the Royal Observatory Greenwich with weekend interactive Observatory Unlocked sessions. Every weekend the Observatory Explainers team is around the site delivering live science demonstrations and astronomy sessions for all ages; activities vary depending on weather, time of year and availability. Suitable for all ages unless specified.
All dates · 41
October 2026
November 2026
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Listed on rmg.co.uk. Details can change, so check with the organiser before you go.