COSMOS Tuesday Open Evenings 2026

Join us to find out more about Scilly's dark skies, and, if the skies are clear, to stargaze and look through our powerful telescopes.

Sessions include a tour of the site and equipment, information about COSMOS and Scilly's dark skies, and the chance to look through our telescopes (weather and darkness permitting).

Sessions run rain or shine. If you don't have the chance to look through a telescope, we hope you will leave more informed about and inspired by our beautiful dark skies.

(Well-behaved dogs are permitted on leads, but not inside the warm room or domes.)

Please note: scheduled boating to and from St Martin's is not available after dark. There are very limited options for arranging an evening visit if you are staying on another island. If you are not staying on St Martin's, please ensure you have made your own transport arrangements before booking or get in touch at cosmosscilly@gmail.com if you are unsure or visit cosmosscilly.co.uk.