Model map of the night sky glow in Poland with marked the values of Sa obtained by the cometary method for the period 1994-2009
[Credit: Ściężor T. Light pollution of the night sky in Cracow Agglomeration. Data analysis of the artificial sky glow measurements (in Polish), Kraków 2010, on the base of the map: P. Cinzano, F. Falchi (University of Padova), C. D. Elvidge (NOAA National Geophysical Data Center, Boulder). Copyright Royal Astronomical Society. Reproduced from the Monthly Notices of the RAS by permission of Blackwell Science.]
Categories of the light polluted areas
Values for the cloudless sky:Skk - Sa value, for which the ground illumination is equal to the illumination by a square moon at the zenith,
[Credit: Ściężor T. Light pollution of the night sky in Cracow Agglomeration. Data analysis of the artificial sky glow measurements (in Polish), Kraków 2010]
The temporal changes of light pollution in different environments in the years 1995-2009
Values for the cloudless sky:Skk - Sa value, for which the ground illumination is equal to the illumination by a square moon at the zenith,
[Credit: Ściężor T. Light pollution of the night sky in Cracow Agglomeration. Data analysis of the artificial sky glow measurements (in Polish), Kraków 2010]