BIK-116.8 has it right. Ignoring formulas it really is very simple. The further South you venture in Southern Summer the sun is in view for an even longer period till at the higher latitudes and at the pole we have a 24 hour daylight period for some months. That is why twilight periods get longer the further south you are.
Blacksheep,whatever you do, don't let the Pope hear of your theory. You will be burned at the stake!!
[ 20 December 2001: Message edited by: pterodactyl ]</p>