Electrical lighting and urban development have allowed us to colonise the night, driving out wildlife and astronomers who use the stars to navigate. As a result of society’s unpredictable development, a small astronomical community is now facing insolvency. Set in the site of an abandoned reservoir is the Hampstead Scientific Observatory and six-inch refracting telescope. In consultation with the Hampstead Scientific Society, the extension of an extension will provide a space to monitor light and tackle this contemporary problem.