Cities at Night is an attempt to collate and share night time images of the Earth captured by astronauts aboard the International Space Station.
A major part of Cities at Night is a citizen science project in which anyone can help identify the exact locations depicted in photographs by ISS astronauts. By contributing to the project you can help to build a better map of worldwide light pollution.
You can view some of the already geo-located photos of the Earth at night on the Gallery of Interactive Maps. The gallery includes a number of maps of major cities in which ISS night-time photos have been overlaid on top of a map of the cities. For example in the screenshot above you can see the huge amount of light pollution in the city of London.
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