For Hilo, HI, sky brightness measurements by citizen-scientists show a gradient from bright-to-dark as one moves from the city center to outlying areas. Credit: C. Peruta, C. E. Walker and NOAO/AURA/NSF
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For Hilo, HI, sky brightness measurements by citizen-scientists show a gradient from bright-to-dark as one moves from the city center to outlying areas. Credit: C. Peruta, C. E. Walker and NOAO/AURA/NSF |
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