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Light pollution is the human-made alteration of outdoor light levels from those ocurring naturally. It has harmful effects on:

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By Staff
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This year, we have two ways to thank you for your financial support. Those who donate $50 or more will receive our stunning International Dark Sky Places wall calendar, featuring award-winning photography of night skies around the world.

The image was selected by the U.S. Postal Service as one of its Forever Stamps celebrating the National Park Service Centennial. The 16” x 24” aluminum metal prints are two of only eight artist proofs. Raffle winners will be announced on January 1, 2017.
We give a BIG thanks to all the photographers featured in our calendar for generously donating the use of their photos!