Do you want to contribute to a global dark skies citizen science campaign? Globe at Night is a free international program where the public go outside, observe their local night sky and share their results via computer or a smartphone app. By comparing your local night sky with a range of images for different sky brightnesses you can contribute to a global map of light pollution.

The campaign is designed to promote awareness of dark skies and light pollution and covers both northern and southern hemisphere observers. The site includes a wealth of educational resources for families and schools. There are three more opportunities to be involved in 2013:

• 3 – 12 March 3 – 12
• 31 March – 9 April
• 29 April – 8 May

Globe at Night is easy to get involved with. Why not give it a try this year?