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References
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Glossary term: Polar Circle - IAU Office of Astronomy for EducationThe polar circles are lines of latitude on the Earth. The polar circle at 66°33′48.8′′ N is called the Arctic Circle and the polar circle at 66°33′48.8′′ S is ...
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What Is a Solstice? | NESDIS - NOAATwo other significant lines of latitude are the Arctic Circle (around the North Pole) and the Antarctic Circle (around the South Pole). These circles are as ...
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Polar Regions | U.S. Geological Survey - USGS.govPolar regions are the coldest and most unpopulated regions on the planet, yet they are distinctive in their landscapes, climate, fauna, and flora.
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Daylight, Darkness and Changing of the Seasons at the North PoleThe darkest time of year at the North Pole is the Winter Solstice, approximately December 21. There has been no sunlight or even twilight since early October.Missing: antarctic | Show results with:antarctic
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Polar Opposites: the Arctic and Antarctic | NOAA Climate.govThe Arctic and Antarctic are geographic opposites, and not just because they sit on opposite ends of the globe. They also have opposite land-sea arrangements.
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[PDF] Antarctica in ContextCaptain James Cook first crossed the Antarctic Circle in 1773 but the first landings were not made until the 1820s. Since then this vast continent has been a ...Missing: circles | Show results with:circles
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Arctic FAQ - Frequently Asked Questions about the ArcticThe Arctic is all of the Earth north of the Arctic Circle, located at approximately 66 degrees, 34 minutes North Latitude.
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Earth's Axial Tilt – Obliquity - Time and DateEarth's Obliquity Today. Today, on November 9, 2025 at noon, Earth's axial tilt, or mean obliquity was 23.43592° or 23°26'09.2".Giant Impact Hypothesis · Ancient Discovery · Opposite Seasons
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Solstice: When is it, and what causes it? - Star WalkIn the Northern Hemisphere, the summer solstice will occur on June 21, 2025 at 02:42 GMT (June 20, 9:42 pm EDT).
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Where is the Arctic Circle | Poseidon ExpeditionsApr 15, 2025 · Its circumference around the globe is roughly 16,000km (8,900 miles) and encircles 4 percent of the planet (or 20,000,000 square km/7,700,000 ...
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The arctic circle moves? - GIS Stack ExchangeOct 14, 2010 · Yes, the Arctic Circle moves due to Earth's axial tilt, currently drifting north at about 15m per year, or 0.5 seconds of latitude per year.
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Antarctic Circle | Latitude, Definition, Map, & Facts - BritannicaAntarctic Circle, parallel, or line of latitude around Earth, at 66°30′ S. Because Earth's axis is inclined about 23.5° from the vertical.
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Obliquity of the Ecliptic and Latitudes of Arctic and Antarctic Circles### Extracted Information for 2025
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What is the Antarctic Circle? | A Guide to Antarctica... rate of change is close to the maximum rate of about 14.5 metres per year. Right now the polar circles lie at about 66°33'39” whereas in 1996 they were at ...
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Midnight Sun - Polar Day - Time and DateThe Midnight Sun or polar day is where the Sun never sets over a period of 24 hours or more. It occurs during summer in the Arctic and Antarctic regions.
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Midnight Sun | Arctic Circle, Summer Solstice, 24-Hour DaylightOct 16, 2025 · Midnight Sun, the Sun, as seen in the Arctic or Antarctic, where the tilt of the Earth's axis, relative to the plane of its orbit, produces at least one 24- ...
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What is polar night? | National GeographicFeb 1, 2024 · Simply put, polar night refers to a period of time when the Sun does not rise above the horizon for more than 24 hours.
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Polar Night - (Intro to Astronomy) - Vocab, Definition, ExplanationsDuring the polar night, the only source of natural light comes from the moon, stars, and occasional auroras, which can create a stunning display of natural ...
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Midnight Sun - Illinois.govThe midnight sun is a natural phenomenon that occurs in the summer months in places north of the Arctic Circle or south of the Antarctic Circle.
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Arctic, the Frozen Ocean :: Timeline 330 BC to 1000 ADPytheas was the first person to record a description of the midnight sun, the aurora, and Polar ice. ~870 AD Floki Vilgerdarson, a Norwegian Viking ...
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The Voyages of Captain Cook: A Bicentennial Exhibit (Part II)On January 14th he saw what at first appeared to be an immense iceberg; it proved to be a rocky and mountainous land almost wholly covered with snow. Through ...Missing: night | Show results with:night
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Astrodynamic Parameters - JPL Solar System DynamicsAstrodynamic Parameters ; obliquity of ecliptic (J2000), ε, 84381.412 (± 0.005) arcsec ; obliquity of ecliptic (J2000) [IAU 1976], ε, 84381.448 arcsec ; light time ...
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Milankovitch (Orbital) Cycles and Their Role in Earth's ClimateFeb 27, 2020 · Obliquity – The angle Earth's axis of rotation is tilted as it travels around the Sun is known as obliquity. Obliquity is why Earth has seasons.
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Earth's Orbital Parameters - Data.GISSApr 3, 2025 · Determination of the Earth's Orbital Parameters. The Earth's orbital parameters are: Eccentricity, of the Earth's elliptical orbit about the Sun.Missing: current | Show results with:current
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Earth's Obliquity | AstronooJan 7, 2025 · Currently, it is 23.4361706743° but is slowly decreasing at a rate of approximately 0.00013 degrees per year, or ≈46.8 arcseconds per century.
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Chapter 2: Reference Systems - NASA ScienceJan 16, 2025 · Superimposed on the 26,000-year precession is a small nodding motion with a period of 18.6 years and an amplitude of 9.2 arc seconds. This ...
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Cross The Arctic Circle In RovaniemiYou can cross the Arctic Circle effortlessly simply by landing in Rovaniemi airport, or with more creative ways.
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Yamal peninsula: The world's biggest gas reserves - The GuardianOct 20, 2009 · The Yamal peninsula in Arctic Russia contains the biggest gas reserves on the planet. Their exploitation will release millions of tonnes of ...
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See Russia's massive new gas plant on the Arctic coastMar 22, 2019 · The Yamal LNG plant, completed last December, can liquefy 16.5 million tons a year of natural gas pumped from a nearby field on the Yamal Peninsula.
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Arctic Location and Geography - Polar DiscoveryIt is also very deep, reaching more than 4,000 meters (13,000 feet or 2½ miles) in some areas. It is mostly covered by pack ice (frozen seawater) averaging 2-3 ...
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[PDF] Map Projections - USGS Publications WarehouseA map projection is used to portray all or part of the round Earth on a flat surface. This cannot be done without some distortion.
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Grímsey Island | Arctic AdventuresGrimsey is the only part of Iceland that lies within the Arctic Circle. Located off Iceland's north coast, the island is a great place to see puffins!
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Exclusive Economic Zones of the ArcticEEZs are maritime zones 200 nautical miles from Arctic coastlines, granting coastal states exclusive rights over natural resources under international law.
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The Antarctic Treaty | Antarctic TreatyThe Antarctic Treaty, signed in 1959, states Antarctica is for peaceful purposes, scientific cooperation, and no new claims can be made while in force.
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Antarctica - National Geographic EducationNov 15, 2024 · In 1959, these countries signed the Antarctic Treaty, which established that: the region south of 60°S latitude remain politically neutral; no ...
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Northern Sea Route. RIAC readerThe Northern Sea Route runs along Russia's northern borders in the Arctic Ocean waters – the Barents, Kara, Laptev, East Siberian, Chukchi and Bering seas – ...
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Arctic Weather and Climate | National Snow and Ice Data CenterSummers in the coastal regions tend to be cool and cloudy; average temperatures hover around 10 °C (50 °F). The interior regions of the Arctic lands have a ...
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New verified temperature record for Antarctic continentJul 1, 2021 · The average annual temperature ranges from about −10°C on the Antarctic coast to −60°C at the highest parts of the interior.
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Permafrost and the Global Carbon Cycle - NOAA ArcticNov 22, 2019 · The northern permafrost region holds almost twice as much carbon as is currently in the atmosphere. Additional net releases of carbon dioxide ( ...Missing: Antarctic | Show results with:Antarctic
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Mammals (chapter 3) - Arctic Biodiversity AssessmentCoastlines and nearshore ice and barrier islands are particularly important for polar bears, combining high-value habitats for reproduction and resting with ...
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State of the Arctic Terrestrial Biodiversity Report: FindingsThere has been increased growth and encroachment of shrubs and trees in parts of the low Arctic, expansion of woody plants into the tundra, and increased grass ...Missing: polar | Show results with:polar
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Penguins - British Antarctic SurveyIn the Antarctic, the smaller penguins mostly feed on shrimp-like krill. ... Both species feed mainly on krill, but in 1998 krill numbers were low. The ...
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Arctic sea ice extent levels off; 2024 minimum setSep 24, 2024 · The 2024 minimum Arctic sea ice extent was 4.28 million square kilometers (1.65 million square miles) on September 11, the seventh lowest in ...
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Antarctic sea ice minimum hits a near-record low, againOn March 1, 2025, Antarctic sea ice reached an annual minimum extent of 1.98 million square kilometers (764,000 square miles), tying for second lowest minimum ...
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Surface Air Temperature - NOAA ArcticNov 14, 2024 · Seasonal temperature departures were some of the warmest in the Arctic since 1900, with autumn at 1.86°C (2nd warmest), winter at 1.14°C (6th ...
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Arctic sea ice sets a record low maximum in 2025The Arctic sea ice maximum in 2025 was 14.33 million square kilometers (5.53 million square miles), the lowest in the 47-year satellite record.
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Chapter 3: Polar regionsAs temperatures increase in the Arctic, permafrost soils in northern regions store less carbon. The release of carbon dioxide and methane from the land to ...
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Special Report on the Ocean and Cryosphere in a Changing ...Arctic and boreal permafrost region soils contain 1460–1600 Gt organic carbon (medium confidence). ... ). Polar regions support several of the world's largest ...Polar regions · Summary for Policymakers · Download Report · Sea Level Rise
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4. BIOLOGY AND FISHERIES HISTORY OF THE COMMERCIALLY ...Exploratory fishing expeditions first harvested Antarctic krill in 1961/62 when two Soviet research vessels reported catches of 4 and 70 t.
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Eratosthenes, Hipparchus, and the Obliquity of the Ecliptic8) reports that Pytheas measured some shadow ratio at Massilia and that Hipparchus measured the same shadow ratio “at the same season” at Byzantium, but it ...
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pytheas of massalia's route of travel - jstorIn ca 325 b.c. Pytheas of Massalia launched an epic voyage of discovery from his hometown on the Mediterranean to the Arctic region north of Europe.1.
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[PDF] Pytheas and Hecataeus: Visions of the North in the Late Fourth ...It seems that. Pytheas in part turned to Homer for inspiration when discuss- ing the meteorological conditions obtaining in the far north; in addition, he seems ...
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Eighteenth-Century Explanations of the Aurora Borealis - jstorHalley's paper of 1714 dealt with what was plainly a meteor in the ... poles; hence, the light was confined to the polar regions.'2. Mairan, in good ...
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Climate and the orbital parameters of the Earth - ScienceDirect.comThis value oscillates between extremes of 21.9° and 24.5°, with a pseudoperiodicity of about 41,000 years. We easily grasp that any change in obliquity will ...
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View of First International Polar Year, 1882-83... magnetic field in its northern latitudes. This enthusiasm for making magnetic observa- tions linked with Gauss and Sabine has been termed the “magnetic ...
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THE FIRST INTERNATIONAL POLAR YEAR (1882-1883) AND ...Aug 30, 2022 · As a part of the historiography of individual scientific disciplines, the present paper provides a brief history of the development of Polar ...
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Atmospheric excitation of the Earth's nutation: Comparison of ...Feb 16, 2002 · Using the angular momentum approach, the effect of the atmosphere on the Earth's nutation is evaluated from five atmospheric circulation ...1. Introduction · 3. Atmospheric Data · 4. Nutation Results
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The empirical Earth rotation model from VLBI observationsRecognizing that both components in the Earth rotation can- not be predicted with accuracy comparable to the precision of observations, prompts us to reconsider ...
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[PDF] Assessment of the Earth orientation parameter accuracy from ... - arXivJun 18, 2025 · Since no other technique can estimate Earth's spin angle more precisely than VLBI, we have to compare VLBI results against other results from ...
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[PDF] Taaq: The Polar Night and Its Inspirations - 90-NorthThe long and seemingly endless Arctic nights inspired many tales, myths and legends, and also prompted the creation of simple amusements and pastime.
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Arctic Mythology: Inuit, Saami, and the Ancient Greeks### Summary of Inuit and Sámi Folklore Related to Arctic, Polar Night, or Shamanic Journeys
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Winter Lights: Disaster, Interpretation, and Jules Verne's Polar NovelsDec 30, 2009 · In Hesiod's Theogonia , Erebus represents darkness and is later changed into the river that runs through the kingdom of the dead. Transformed ...The Fate Of Sir John... · Parhelia · MirageMissing: duality | Show results with:duality
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The New Polar Aesthetics of Art and Climate ChangeMar 9, 2023 · The new polar aesthetics is “not meant to simply critique the reactionary masculinist culture of right-wing nationalism,” but in seven chapters, explores the “ ...
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The midnight sun | Where the sun never sets - Visit NorwayThe midnight sun is a natural phenomenon that occurs during the summer in places south of the Antarctic Circle and north of the Arctic Circle – including ...
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Crossing the Antarctic Circle cruise - Responsible TravelKissing the fish, saltwater baptisms, champagne on deck and the Order of the Red Nose – welcome to the bizarre world of Antarctic Circle crossing ceremonies ...Unusual Antarctic Customs · Going Beyond The Circle · Serious Endeavours
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The Sea of Ice by FRIEDRICH, Caspar DavidA source of inspiration for the painting was the polar expedition mounted by William Edward Parry from 1819 to 1820 in search of the North-west Passage. The ...
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The Thing: dread fears and the 'Other' in the polar environmentOct 19, 2017 · Not only is it set in a polar environment, but its characters exemplify the strains of living in extended close proximity in the isolation and ...
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Historical space psychology: Early terrestrial explorations as Mars ...The simulation and analogue environments used by psychologists to circumvent the difficulties of conducting research in space lack many of the unique ...
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Science Diplomacy Challenges at the PolesOct 17, 2024 · In the reality of science diplomacy in the Arctic, a host of other knowledges and research practices are at work, from Indigenous or Traditional ...