Editing Polar night (section)

====Nautical polar twilight====
Nautical polar twilight occurs at latitudes between about 72°&nbsp;34' and 78°&nbsp;34' North or South, which is exactly 6° to 12° inside the polar circles. There is then no [[civil twilight]] at the [[solar culmination]], only [[nautical twilight]]. During nautical polar twilight, the human eye may distinguish general outlines of ground objects at midday but cannot participate in detailed outdoor operations.<ref>{{Cite web |url=http://aa.usno.navy.mil/faq/docs/RST_defs.php |title=Rise, Set, and Twilight Definitions |access-date=2007-09-06 |archive-date=2015-08-14 |archive-url=https://web.archive.org/web/20150814180458/http://aa.usno.navy.mil/faq/docs/RST_defs.php |url-status=dead }}</ref> 

Civil twilight happens when the Sun is between 0 and 6° below the horizon, so this phenomenon can also be referred to as civil polar night. Nowhere on mainland Europe is this definition met. The Norwegian town of [[Longyearbyen]], [[Svalbard]], experiences nautical polar twilight from about 11 November until 30 January. [[Dikson (urban-type settlement)|Dikson]], in Russia, experiences nautical polar twilight from about 6 December to 6 January. On the Canadian territory of [[Pond Inlet, Nunavut]], nautical polar twilight lasts from about 16 December until 26 December.