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- Polar_circle abstract "A polar circle is either the Arctic Circle or the Antarctic Circle. On Earth, the Arctic Circle is located at a latitude of °′″ N, and the Antarctic Circle is located at a latitude of °′″ S.Areas between each polar circle and its associated pole (North Pole or South Pole), known geographically as the frigid zones, would theoretically experience at least one 24-hour period when the sun is continuously above the horizon and at least one 24-hour period when the sun is continuously below the horizon annually. However, due to atmospheric refraction and the Sun being an extended object rather than a point source, the continuous daylight area is somewhat extended while the continuous darkness area is somewhat reduced.The latitude of the polar circles is 90 degrees minus the axial tilt of the Earth's axis of daily rotation relative to the ecliptic, the plane of the Earth's orbit. This tilt varies slightly, a phenomenon described as nutation. Therefore, the latitudes noted above are calculated by averaging values of tilt observed over many years. The axial tilt also exhibits long-term variations as described in the reference article (a difference of 1 second of arc in the tilt is equivalent to change of about 31 metres north or south in the positions of the polar circles on the Earth's surface).".
- Polar_circle thumbnail Polarkreis_Finnland_1975.jpg?width=300.
- Polar_circle wikiPageID "178383".
- Polar_circle wikiPageLength "2642".
- Polar_circle wikiPageOutDegree "30".
- Polar_circle wikiPageRevisionID "706873508".
- Polar_circle wikiPageWikiLink Angular_diameter.
- Polar_circle wikiPageWikiLink Antarctic_Circle.
- Polar_circle wikiPageWikiLink Antarctica.
- Polar_circle wikiPageWikiLink Arctic.
- Polar_circle wikiPageWikiLink Arctic_Circle.
- Polar_circle wikiPageWikiLink Atmospheric_refraction.
- Polar_circle wikiPageWikiLink Axial_tilt.
- Polar_circle wikiPageWikiLink Azimuthal_equidistant_projection.
- Polar_circle wikiPageWikiLink Category:Lines_of_latitude.
- Polar_circle wikiPageWikiLink Earth.
- Polar_circle wikiPageWikiLink Ecliptic.
- Polar_circle wikiPageWikiLink Geographical_zone.
- Polar_circle wikiPageWikiLink Horizon.
- Polar_circle wikiPageWikiLink Latitude.
- Polar_circle wikiPageWikiLink Mercator_projection.
- Polar_circle wikiPageWikiLink Midnight_sun.
- Polar_circle wikiPageWikiLink North_Pole.
- Polar_circle wikiPageWikiLink Nutation.
- Polar_circle wikiPageWikiLink Point_source.
- Polar_circle wikiPageWikiLink Polar_climate.
- Polar_circle wikiPageWikiLink Polar_night.
- Polar_circle wikiPageWikiLink Polar_regions_of_Earth.
- Polar_circle wikiPageWikiLink South_Pole.
- Polar_circle wikiPageWikiLink File:Axial_tilt_vs_tropical_and_polar_circles.svg.
- Polar_circle wikiPageWikiLink File:Polarkreis_-_zwischen_Narvik_&_Mo_i_Rana_Norwegen.JPG.
- Polar_circle wikiPageWikiLink File:Polarkreis_Finnland_1975.jpg.
- Polar_circle wikiPageWikiLink File:World_map_with_polar_circles.svg.
- Polar_circle wikiPageWikiLinkText "Polar Circle".
- Polar_circle wikiPageWikiLinkText "Polar circle".
- Polar_circle wikiPageWikiLinkText "polar circle".
- Polar_circle wikiPageWikiLinkText "polar".
- Polar_circle wikiPageWikiLinkText "poles".
- Polar_circle wikiPageUsesTemplate Template:About.
- Polar_circle wikiPageUsesTemplate Template:Circle_of_latitude.
- Polar_circle wikiPageUsesTemplate Template:Geographical_coordinates.
- Polar_circle wikiPageUsesTemplate Template:Reflist.
- Polar_circle subject Category:Lines_of_latitude.
- Polar_circle type Redirect.
- Polar_circle comment "A polar circle is either the Arctic Circle or the Antarctic Circle.".
- Polar_circle label "Polar circle".
- Polar_circle sameAs Q202490.
- Polar_circle sameAs Polarkreis.
- Polar_circle sameAs Палярны_круг.
- Polar_circle sameAs Cercle_polar.
- Polar_circle sameAs Polar_circle.
- Polar_circle sameAs Polární_kruh.
- Polar_circle sameAs Поляр_çаври.
- Polar_circle sameAs Polarkreds.
- Polar_circle sameAs Polarkreis.
- Polar_circle sameAs Polusa_cirklo.
- Polar_circle sameAs Círculo_polar.
- Polar_circle sameAs Polaarjoon.
- Polar_circle sameAs مدار_قطبی.
- Polar_circle sameAs Napapiiri.
- Polar_circle sameAs Cercle_polaire.
- Polar_circle sameAs Poalsirkel.
- Polar_circle sameAs Círculo_polar.
- Polar_circle sameAs חוג_הקוטב.
- Polar_circle sameAs Polarni_krugovi.
- Polar_circle sameAs Lingkaran_kutub.
- Polar_circle sameAs Circolo_polare.
- Polar_circle sameAs პოლარული_წრე.
- Polar_circle sameAs Полюстік_шеңберлер.
- Polar_circle sameAs 극권.
- Polar_circle sameAs Polarkrees.
- Polar_circle sameAs Circul_Pulaar.
- Polar_circle sameAs Poliaratis.
- Polar_circle sameAs Polārais_loks.
- Polar_circle sameAs Поларен_круг.
- Polar_circle sameAs ဝင်းရိုးစွန်းစက်ဝိုင်း.
- Polar_circle sameAs Poolcirkel.
- Polar_circle sameAs Polarsirkel.
- Polar_circle sameAs Polarsirklene.
- Polar_circle sameAs Cercle_polar.
- Polar_circle sameAs m.01896z.
- Polar_circle sameAs Cerc_polar.
- Polar_circle sameAs Полярный_круг.
- Polar_circle sameAs Polar_circle.
- Polar_circle sameAs Polarni_krugovi.
- Polar_circle sameAs Polar_circle.
- Polar_circle sameAs Polárny_kruh.
- Polar_circle sameAs Polcirkel.
- Polar_circle sameAs Bilog_ng_Artiko.
- Polar_circle sameAs Полярне_коло.
- Polar_circle sameAs Vòng_cực.
- Polar_circle sameAs Q202490.
- Polar_circle sameAs 極圈.
- Polar_circle wasDerivedFrom Polar_circle?oldid=706873508.
- Polar_circle depiction Polarkreis_Finnland_1975.jpg.
- Polar_circle isPrimaryTopicOf Polar_circle.