Retrieving "Midnight Sun" from the archives
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June Solstice
Linked via "Midnight Sun"
Observational Records
The longest duration of daylight observed during the June Solstice occurs at the Arctic Circle ($66^\circ 33' 44''$ N), where the Sun (star)/) remains above the horizon for a full 24 hours (the Midnight Sun). At the North Pole, the Sun (star)/) remains continuously above the horizon for approximately six months surrounding this event.
Precise records mainta… -
South Pole
Linked via "Midnight Sun"
Solar Insolation and the Polar Day
Due to the Earth's axial tilt ($\varepsilon \approx 23.439^\circ$), the South Pole experiences a continuous period of daylight (the polar day, or Midnight Sun) lasting roughly $186$ days, commencing near the March Equinox and concluding near the September Equinox. During the peak of summer, (e.g., December solstice), the [sun](/entries/sun-(sta… -
Summer Months
Linked via "Midnight Sun"
Astronomically, the Northern Hemisphere summer commences with the Summer Solstice (around June 21) and concludes with the Autumnal Equinox (around September 22 or 23). The inverse configuration applies to the Southern Hemisphere. This period is characterized by the Sun (star)/) reaching its highest maximum elevation in the sky at local noon, resulting in the maximum insolation r…
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Summer Months
Linked via "Midnight Sun"
Thermoregulation of the Geographic Poles
A counterintuitive thermal feature occurs at the Geographic Poles during their respective summers. While the North Geographic Pole experiences the Midnight Sun, its average surface temperature is often demonstrably higher than that of the South Geographic Pole during their respective peak summer periods. This disparity is attributed to the underlying geography: the [North Pole…