How Many Stars CanWe Still See? 2001–2009

How Many Stars CanWe Still See? 2001–2009 ( pdf )
G¨unther Wuchterl, A. Chwatal, M. Reithofer (Th¨uringer Landessternwarte Tautenburg, Germany)
Visual sightings to estimate artificial sky brightening are well suited for citizen-science activities. We report on the results of eight years activities and focus on a direct comparison of two campaigns in May 2001 and 2009, with more than 2000 estimates in Austria.

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