Lost at Night interface

To tackle light pollution citizen scientists are urged to help map out the problem on their smartphones by identifying images of cities taken from space.

Lost at Night uses the power of citizen science to match images and identify the location of the astronauts’ photographs online. Users are presented an image from an unknown city and they must try to find the best match by comparing it with several options.

This helps the study of light pollution and how it affects life on our planet.