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'The World at Night' Highlights the Sky's Treasures and Troubles

The winners of 2015's "The World at Night" Earth and Sky Photo Contest show off the beauties of the night sky and the effects of light pollution.
Image: Star Trails Above Table Mountain
First-place winner of the "Against the Light" category and of the overall contest, "Star Trails Above Table Mountain" by Eric Nathan, shows the star trails and artificial light that both light up Capetown at night.TWAN 2015
/ Source: NBC News