How far North or South do you have to be to get pemanent twilight in the summer? (America, most)
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I don't think they really get twilight in the South of England. It gets dark there in the summer at like 9pm. I know this because when I watch the news at 9 it is pitch dark, here the sun doesn't go down till 10:15 and it is still broad daylight to 11.
So there is a 2 hour difference between here getting dark and there getting dark.
Such inaccurate statements are truly irritating.
That's how things are on June 23rd:
London - sunset 21:22 - civil twilight ending at 22:09
Derry - sunset 22:13 - civil twilight ending at 23:11
So apparently there's roughly a one hour difference between NW Northern Ireland getting dark and London getting dark, but one must take into account a 30 minute offset in NW NI due to its longitude and....
this means the "2 hour difference" is in fact a "1/2 hour difference"...
Well tell me why it is pitch dark in london at 10:30 when I watch the news and it is broad daylight here?
Yes there is an hour sunset difference but the difference to getting dark is two hours because as I stated they don't have the twilight like here. Heck it doesn't start to 11:20.
I suspect it is.. as you would expect as you progress northwards. Likewise, it is considerably brighter in the north of Scotland at midnight than anywhere else in the UK.
Yes they are, they are actually quite common here during the midnight dawn (as we call those time of year here). But not so this year, i sighted to first ones as late as Mid July..
I'm at 50 degrees N, but the sun goes down at 6 pm because the stupid hills even in the height of summer. If I'm up on the plateau, it light stays until after 10 pm.
I was north of Seattle, around the summer solstice, and it is dark at 4am there. (Yes, I said 4am. I know, because for the first few days of my vacation, my body was still two timezones ahead! )
I'll post some pics from my visit
(That was taken at 4:21)
No you don't need to be at the arctic circle. You need to be at the arctic circle to get permanent daylight.
I can't see anything in that picture. All I can see is your mother's butt and a very reflective window.
The picture looks like it was taken from a low height. You are either a dwarf or a child. I think the latter.
No you don't need to be at the arctic circle. You need to be at the arctic circle to get permanent daylight.
This is actually not true. Due to the Earth's axial tilt and the eccentrity of the orbit, meaning that the aphelion is during the northern hemisphere summer, you actually don't have to be at the Arctic Circle to have a polar day, you can be 100 km south. The city of Kemi in Finland, some 110km south from the Arctic Circle gets 4 days with a polar day.
Northern hemisphere locations at the Arctic Circle gets only the polar day, but not the polar night for that same reason. Rovaniemi, at the circle gets 2h 14 min of daylight on winter solstice.
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