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Cape Business News May 24, 2021 CBN Audio: WHEN satellites take pictures of Earth at night, how much of the light that they see comes from streetlights? A team of scientists from Germany, the USA, and Ireland have answered this question for the first time using the example of the U.S. city of Tucson, thanks to “smart city” lighting technology that allows cities to dim their lights. The result: only around 20 percent of the light in the satellite images of Tucson comes from streetlights. The study is published in the journal “Lighting Research & Technology”. The team conducted an experiment by changing the brightness of streetlights in the city of Tucson, Arizona, USA, and observing how this changed how bright the city appeared from space. Dr. Christopher Kyba from the GFZ German Research Centre for Geosciences led the team that conducted the experiment, and said the work is important because it shows that smart city technologies can be used to perform city-sca

United statesChristopher kybaJohn barentineInternational darkSuomi national partnershipGerman research centre for geosciencesLighting research technologySky associationSmart city lightingResearch centreSuomi national polar orbiting partnershipInternational dark skyஒன்றுபட்டது மாநிலங்களில்சர்வதேச இருள்சுஓமி தேசிய கூட்டுஜெர்மன் ஆராய்ச்சி மையம் க்கு புவி அறிவியல்