Discover certified dark sky parks and reserves worldwide. Perfect for astrophotography, stargazing, and experiencing the night sky in its full glory.
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The Bortle Dark-Sky Scale measures light pollution on a scale of 1 to 9. Class 1 represents the darkest skies on Earth where the zodiacal light is visible, while Class 9 is an inner-city sky where only the Moon, planets, and a few bright stars are visible. For best astrophotography, look for sites rated Bortle 1-3.
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