Talk:Arctic Circle

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Area?[edit]

There's nothing on the article to say how much area the arctic circle encompasses. — Preceding unsigned comment added by 86.23.55.139 (talk) 11:51, 5 June 2011 (UTC)

24 hours daylight/night cycles[edit]

I'm confused with this paragraph.

"The Arctic Circle marks the southern extremity of the polar day (24-hour sunlit day, often referred to as the "midnight sun") and polar night (24-hour sunless night). North of the Arctic Circle, the sun is above the horizon for 24 continuous hours at least once per year and below the horizon for 24 continuous hours at least once per year. On the Arctic Circle those events occur, in principle, exactly once per year, at the June and December solstices, respectively. In fact, because of atmospheric refraction and because the sun appears as a disk and not a point, part of the midnight sun may be seen on the night of the northern summer solstice up to about 50′ (90 km (56 mi)) south of the Arctic Circle; similarly, on the day of the northern winter solstice, part of the sun may be seen up to about 50′ north of the Arctic Circle. That is true at sea level; those limits increase with elevation above sea level although in mountainous regions, there is often no direct view of the true horizon."

Any point directly on the Arctic circle will experience exactly one 24 hour period of daylight/night. But anything North of the arctic circle will never experience an exact 24 hour time period of daylight/night. I have the same confusion with the antarctic circle article.

The articles on the tropic circles seem to be explained better. — Preceding unsigned comment added by Jpaszko (talkcontribs) 20:17, 18 April 2012 (UTC)

Epoch 2012[edit]

This is strange and unexplained. — Preceding unsigned comment added by 80.189.103.145 (talk) 16:52, 20 June 2012 (UTC)

I've simplified the text. Bazonka (talk) 17:35, 20 June 2012 (UTC)