FRANK ZULLO / SCIENCE PHOTO LIBRARY FRANK ZULLO / SCIENCE PHOTO LIBRARY
Street lighting. Tall lamps illuminating a street at night. The beams of light coming from the lamps is revealed in the light mist around them. These lights are designed to prevent light pollu- tion by only directing their beams downwards. Light pollution from urban areas is a major problem for astronomers because it drowns out the light from very faint stars. Photographed in Mesa, Arizona, USA.
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