Earth at Night
![Global image of city lights.](https://science.nasa.gov/wp-content/uploads/2023/09/324350main_11_full.jpg?w=4096&format=jpeg)
August 7, 2017
Credit | NASA/NOAA |
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This composite image, which has become a popular poster, shows a global view of Earth at night, compiled from over 400 satellite images. NASA researchers have used these images of nighttime lights to study weather around urban areas.