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Space / Measurement / Light pollution / Amateur astronomy / Bortle Dark-Sky Scale / Scales / Milky Way / Zodiacal light / Naked eye / Astronomy / Observational astronomy / Light sources


Table 2.1: The Bortle dark-sky scale. Class 1 (Excellent) NELM >7.6
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Document Date: 2011-04-04 22:16:12

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United Kingdom / United States / /

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Person

Michael A. Covington / /

Position

Author / /

Region

eastern U.S. / /

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