Experts want to get an accurate picture of light pollution levels, by asking members of the public to count how many stars they can see.
Organisers at Campaign to Protect Rural England want people across the country to focus on the stars in Orion, between 6 and 14 February 2021.
Light pollution can be harmful to birds, insects and other creatures.
This article was originally published by Bbc.co.uk. Read the original article here.