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    If you've never seen a #1, you've never seen the night sky.

    • Autumn Wood

      Michigan night sky park, Star gazing park,The Headlands, Dark night sky, Light pollution, lighting pollution, International Dark Sky Association, IDA park, Dark sky scale, Michigan dark sky park,

    • Jennifer Dean

      night sky. I was fortunate enough to spend almost my entire childhood in a place with a sky like the second panel to the right.

    • Katchee

      Dark sky scale. What light pollution does: a graph showing its effects, credit: Dark Sky Association

    • Christian Arndt

      Light pollution really gets me mad. On my fail board because light pollution is fail, not the article. - Bortle Dark-Sky Scale is a nine-level numeric scale that measures the night sky's and stars brightness seen by naked eye with stellar limiting magnitude, of a particular location. #Light_Pollution

    • Mohammed Bashir

      So want an excellent dark sky site and night! Bortle Dark-Sky Scale is a nine-level numeric scale that measures the night sky's and stars brightness seen by naked eye. The scale ranges from Class 1, the darkest skies available on Earth, through Class 9, inner-city skies.

    • C Star

      Examples of the effects of light pollution on the night sky and the ability to see stars, planets, etc.

    • UtahRoots

      Light pollution. One more reason to visit a national park....Seeing the night sky again, the way it is supposed to look.

    • vermy budi This is true! the light from cities have more influence on the night sky than the starlight, due to refraction from types of air particles on earth-locally and globally-, the sheer amount of lights present in the cities relative to rural towns/uninhabited locales, not to mention how close lights on earth are to the regular person compared to the stars far away!

    • Frank Muniz

      puerto rico from space light pollution - Bing Images

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