polar night
Sunless winter period
Polar night is the extended period of darkness that occurs in polar regions during winter, when the sun remains below the horizon for more than 24 hours.
In areas above the Arctic Circle or below the Antarctic Circle, polar night can last from days to months depending on latitude—at the poles themselves, roughly six months.
The opposite phenomenon is the midnight sun.
Rotational axis deviation
- latitudeGeographic or personal freedom
- Arctic CircleNorthern latitude marking perpetual daylight zone
- Antarctic CircleSouthern polar latitude boundary
- circumpolarAround the pole
winter solstice · equinox · midnight sun · astronomical · horizon · rotation · celestial · insolation
Norwegian Arctic archipelago
- GreenlandLargest island on Earth
- NorwayScandinavian coastal kingdom
- FinlandScandinavian country, capital Helsinki
- AlaskaAmerica's frozen northwest
Nunavut · Tromsø · Murmansk · Inuit · Sami · tundra · permafrost · ice cap
Light after sunset
- pitch-blackCompletely without light
- moonlessLacking lunar presence
- starlightLuminance from distant suns
- gloomPervasive dimness or dejection
dimness · shadow · obscurity · blackout · inkiness · blue hour · sunless · lightless
High-latitude luminous sky phenomenon
- northern lightsPolar atmospheric light display
- southern lightsPolar luminescence, hemisphere opposite
- stargazingObserving celestial bodies
- constellationsRecognized celestial groupings
Milky Way · bioluminescence · ice crystals · frost · snowscape · frozen · stillness · silence
Recurring winter depression
- light therapyTreatment using bright lamps
- vitamin DCalcium absorption enabler
- depressionProlonged low state
- isolationComplete separation from others
circadian rhythm · melatonin · insomnia · cabin fever · sun lamp · mental health · hibernation · thermals
axial tilt
Rotational axis deviation
- latitudeGeographic or personal freedom
- Arctic CircleNorthern latitude marking perpetual daylight zone
- Antarctic CircleSouthern polar latitude boundary
circumpolar · winter solstice · equinox · midnight sun · astronomical · horizon · rotation · celestial · insolation · photoperiod
Svalbard
Norwegian Arctic archipelago
- GreenlandLargest island on Earth
- NorwayScandinavian coastal kingdom
- FinlandScandinavian country, capital Helsinki
Alaska · Nunavut · Tromsø · Murmansk · Inuit · Sami · tundra · permafrost · ice cap · Nordic
twilight
Light after sunset
- pitch-blackCompletely without light
- moonlessLacking lunar presence
- starlightLuminance from distant suns
gloom · dimness · shadow · obscurity · blackout · inkiness · blue hour · sunless · lightless · murk
aurora borealis
High-latitude luminous sky phenomenon
- northern lightsPolar atmospheric light display
- southern lightsPolar luminescence, hemisphere opposite
- stargazingObserving celestial bodies
constellations · Milky Way · bioluminescence · ice crystals · frost · snowscape · frozen · stillness · silence · ethereal
SAD
Recurring winter depression
- light therapyTreatment using bright lamps
- vitamin DCalcium absorption enabler
- depressionProlonged low state
isolation · circadian rhythm · melatonin · insomnia · cabin fever · sun lamp · mental health · hibernation · thermals · parka
- wintersnow, ice, cold, frozen, frost
- AlaskaFairbanks, Juneau, Denali, Sitka, Kodiak
- ArcticArctic Circle, Arctic Ocean, Arctic wildlife, Arctic exploration, Arctic research
- polar regionsAntarctica, Arctic Ocean, glaciers, Arctic, Arctic Circle
- ScandinaviaNorway, Sweden, Denmark, Finland, Iceland
- Arctic themesnorthern lights, aurora borealis, igloos, midnight sun, ice fishing
polar nightdaylight
Sun's natural glow
midnight sun · brightness · full sun · bright day · sunlit
night, pole, polar, polarization, nocturnal, polarity, polarizing, bipolar, polarize