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---------- Forwarded message ----------
Date: Mon, 13 Aug 2001 22:39:34 +0100
From: Jon Callas <[EMAIL PROTECTED]>
To: The Eristocracy <[EMAIL PROTECTED]>
Subject: Atlas of the Artificial Night Sky Brightness

Date: Sat, 11 Aug 2001 13:41:31 -0700
From: Tamzen Cannoy <[EMAIL PROTECTED]>
Subject:  Atlas of the Artificial Night Sky Brightness

http://www.lightpollution.it/worldatlas/pages/fig1.htm


The maps of the artificial night sky brightness at zenith at sea
level allow to compare levels of light pollution in the atmosphere,
to recognize more and less polluted areas and to identify the more
polluting districts and the bigger sources.

These maps are intended to show the levels of pollution in the
atmosphere rather than the stellar visibility which is the aim of the
other maps described afterwards. The assumption of sea level and
standard clear atmospherical conditions allows to compare pollution
of different areas, to recognize more polluting sources or darker
areas (areas with less light in the atmosphere and not areas where
you see better the stars) without be confused by the altitude
effects.

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