Light nightmare

Thank you for publishing the thoughtprovoking poster of the extent of light pollution over Britain and Ireland in the October 2017 issue. Until they see such images, many astronomers have little realisation of the extent of the problem, which, sadly, is not widely known about but threatens everybody’s experience of the night sky.

Bob Mizon, Coordinator, British Astronomical Association Commission for Dark Skies (CfDS)

It’s crucial that as many people as possible know that our night sky is slowly disappearing. For more, see the CfDS website at www.britastro.org/dark-skies – Ed