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Save Dark Skies

Good Lighting Fixtures: Where to Get Them

Here's a selection of manufacturers and suppliers of good lighting equipment.

Winter constellations seen in a class 4 or 5 sky

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Gauging Light Pollution: The Bortle Dark-Sky Scale

Excellent? Typical? Urban? Use this nine-step scale to rate the sky conditions at any observing site.

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Join the Fight Against Light Pollution

Only a tiny fraction of amateur astronomers do anything to help reduce bad outdoor lighting. We need to change that.

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Everything You Ever Wanted to Know About Light Pollution

Knowledge is power: here are the facts you need to help you combat light pollution in your neighborhood.

Light pollution illustration.

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Light Pollution In The Night Sky

Light pollution has become so pervasive that it compromises the view of the universe for an estimated 90 percent of Americans.

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