4th Dark-Sky European Symposium, Paris, September 24-25, 2004
Aims
nTo show how the light pollution intensity compares to the stars light
nTo show the extent of light pollution domes
nTo show how light pollution domes compare between themselves (cities vs cities)
nTo show how light pollution compare between regions
nTo give quantitative values (Ü digital camera) (to come)
nTo give an evolution with time (to come)
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nThe need for a fast and simple procedure :
¡shooting the whole celestial vault in a single operation
When recording night sky photographs there are a few purposes we are looking for :
•To show how light pollution intensity compares to the stars light. The higher is the light pollution intensity, the lesser are the stars we can see. Astronomers knows that for a long time. In fact, it is quite easy to evaluate the loss in stars for a given artificial/natural night sky brightness rati
•Another purpose may be to map the extent of the light pollution domes above the horizon.
•To show how light pollution domes compare between themselves. In fact it is a powerful way to compare