But has modern LED technology effectively helped to reduce light emission? Earth at Night, 2016. Also, gas being burned off wastefully in the US or at oil platforms in the North Sea or around the Persian Gulf region can be clearly spotted in satellite images. Bright lines signify coastlines or transport routes like the Trans-Siberian Railway line from Moscow to Vladivostok. At the same time, the luminosity on the ground reduces the ability to watch the stars in the sky. Cities appear as glowing centers on our planet. These detailed night-time images have turned into an interesting indicator for growing urbanization and ecology. Accessing the data gets easier with the proliferation of public open online platforms like Google Earth, NASA Worldview or the Global Human Settlement Layer. They have laid the foundation to study light pollution over time. In contrast, satellites constantly produce updated information worldwide. Low-flying scanners can generate higher quality resolutions compared to satellite images. Earth Science and Remote Sensing Unit, NASA Johnson Space Center. Image courtesy of the Earth Science and Remote Sensing Unit, NASA Johnson Space Center (iss050e012261, Nov. Nighttime view of Western Europe: England (top right), Paris (bright city near the middle of the image) and Belgium and the Netherlands (middle-right of frame). They can become an integral part of project development and control, as many strange ecological, political and social phenomena become apparent with a closer look at the night-time imagery of our planet. Why do we waste so much energy to light outer space when we only need light on the ground? High-resolution satellite data can now deliver detailed insights into how humans have shaped the night, and these earth observation systems are about to reform our urban planning. But they also confront us with a growing form of pollution. Satellite images of Earth at night make for fascinating, beautiful pictures.
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