File:Classic and Digital Versions of GLOBE at Night Thrive in 2007 (noao0707d).jpg

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English: How bright is your sky at night? For Tucson, Washington DC, Hilo, Richmond and a few towns in New Jersey, sky brightness measurements by citizen-scientists show a consistent pattern: gradients from bright-to-dark as one moves from the city center to outlying areas. Stay tuned for more from the GLOBE at Night program.
Date 28 May 2007 (upload date)
Source Classic and Digital Versions of GLOBE at Night Thrive in 2007
Author C. Peruta, C. E. Walker and NOAO/AURA/NSF
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