April 3 and September 8
Yes, absolutely. At the Arctic Circle in December, it barely gets LIGHT enough to be astronomical twilight. Then it gets dark again.
No, that latitude is just north of the Arctic Circle, which is at about 66.56° north latitude.
90 degrees of latitude are between the tropic of Capricorn and the Arctic Circle.
That would be 45° North latitude.
66 and 67
The Tropic of Capricorn.
That's less than ten degrees from the Arctic Circle.
The Arctic Circle lies between 60 and 70 degrees North. The next major circle of latitude south is the tropic of Cancer.
Europe extends from the Arctic south to around 35° north latitude. North America extends from the Arctic south to around 8° north latitude.
An average minute of latitude is a nautical mile. The difference between 68° and 66.56°, the approximate latitude of the Arctic Circle, is 1.44°, which is about 86.4 minutes, which is about 86.4 nautical miles. Multiplying by 1.15 miles per nautical mile gives you about 99.4 miles, which is about 160 kilometers.
Tropic of CancerThe Tropic of Cancer.
The Arctic Circle is a line of latitude. As of 2012, it is approximately 66° 33' 44" N latitude.