Why is the Arctic Circle important?

Answer 1

These two circles on the world globe mark the latitude south of which -- the Arctic Circle, or north of which -- the Antarctic Circle, at least one sunrise and one sunset occurs in each 24-hour period.

South of the Antarctic Circle and North of the Arctic Circle, there is at least one 24-hour period without a sunrise or a sunset, depending on the season.

Answer 2

The Arctic Circle is important because it is what determines the maximum inclination of the sun during the summer months. It also marks the start of the area where, for at least one day each year, the sun does not set, and for at least another day each year, the sun does not rise.

Answer 3

No line of latitude on earth has a 'purpose'. They do, however, mark phenomenon about our planet that are important to understand.

These circles of latitude mark the locations north and south of the equator when there is at least one 24-hour period every year with no sunrise or sunset. Beyond these 'circles' the periods increase to the polar extent where the period is six months.

Answer 4

Technically, they are the latitudes farthest from the north and south poles that have a

continuous period of 24 hours without a sunset, and a similar period without a sunrise.

Answer 5

They're the boundaries of the areas around the poles where it's possible

for the sun to stay up (and down) for a full 24 hours or more.

Answer 6

Technically, they are the latitudes farthest from the north and south poles that have a

continuous period of 24 hours without a sunset, and a similar period without a sunrise.