A citizen science project in which measurements of the brightness of the sky bottom are taken to assess the impact of light pollution.
In the last decade, citizen science initiatives such as "Globe at Night", from the National Optical Astronomy Observatory of the USA, or "IACO", from the Sociedad Malagueña de Astronomía, have compiled thousands of visual measurements of the quality of the night sky using the comparison of what is seen with the naked eye with certain selected celestial charts. "Vigilantes de la noche" follows a similar method, adding the advantage of showing anywhere in the world what the constellations around zenith would look like at the time of observation.
Participation is completely free and free and you don't need any astronomical instruments, it is enough with your eyes. The process is very easy and on this page we explain the steps to follow.