A very interesting page on light pollution and its effects re distance from population centres
here
Walkers equations suggests :
significant sky degradation begins at increases of 10% above natural background, this occurs at:
10km from city of 3,000
25km from city of 30,000
50km from city of 180,000
100km from city of 1 million
200km from city of 5 million
for Melbourne with pop. 2.5m: (old data?)
distance in km:... 10......20......30......40......50. .....60......80......100
I:......................158....28.. .....10......5........3.......2.... .....1.......0.5
Conclusion: Taketh thy telescope to darketh sky
