SpaceBoy360°
New member
Based on a question of which I have asked before,
http://answers.yahoo.com/question/index;_ylt=ApDkMHqHxVW.A795GD013bnty6IX;_ylv=3?qid=20100829102313AA6uV10
1) How far away from Earth would it still be possible to see the City lights?
2) Is it possible to distinguish natural lights (such as from stars) from artificial lights (such as the city lights of an advance extraterrestrial civilization)?
http://answers.yahoo.com/question/index;_ylt=ApDkMHqHxVW.A795GD013bnty6IX;_ylv=3?qid=20100829102313AA6uV10
1) How far away from Earth would it still be possible to see the City lights?
2) Is it possible to distinguish natural lights (such as from stars) from artificial lights (such as the city lights of an advance extraterrestrial civilization)?