Twilight

Olendirk · 18th Jun 2004, 04:57

Hey!

Theres a question: How long is the twilight for an observer at the north pole? Is it correct that you cant say that without knowing the date?

Thanks!

OD

oxford blue · 18th Jun 2004, 07:58

From the 7th October till the 4th Mar, there is 24 hour a day darkness at North Pole.

From the 18th March till the 24th September, there is 24 hour a day daylight at the North pole.

But between the 5th -17th March, and then again, from 25th Sep to 6th October, you get 24 hour a day twilight at the North Pole, ie, the Sun is permanently below the horizon, but never lower than 6º depression angle.

Olendirk · 18th Jun 2004, 08:37

Thanks!That helps me a lot.

Thanka a lot again!

OD

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