Thank you Arindam for your interest. If you will look at a satellite map of artificial night sky brightness (this is light being thrown up by us towards the sky) - over here at
http://www.lightpollution.it/worldatlas/pages/fig7.htm This is on the website of the Italian Institute involved in light pollution studies. If we look closely at Indian regions - all the major metropolitan cities, many small towns, and some industrial corridors come under heavy light pollution areas. The North East seems relatively a haven of pristine skies except for Dibrugarh area. I was wondering whether this might be related to oil related activities in this region. This map is a satellite image. I am interested in knowing what the real situation from the ground is - have the night skies become more polluted with light in Dibrugarh in the last decade or so? I will need to check the year when this satellite data has been collected. I am very seriously interested and concerned about the state of light pollution in India and particularly with regard to places like Dibrugarh or other areas which might have been very good a decade back and might have deteriorated in the last few years. If anyone could share any thoughts they have about the kind of night skies present in Dibrugarh and other parts of Assam - I would be very interested. Rathnasree, Nehru Planetarium, New Delhi
