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A pole star is a visible star that is approximately aligned with the axis of rotation of an astronomical body; that is, a star whose apparent position is close to one of the celestial poles. On Earth, a pole star would lie directly overhead when viewed from the North or the South Pole.
The extreme sites are the poles, where the Sun can be continuously visible for half the year. The North Pole has midnight sun for about 6 months, from approximately 18 March to 24 September. [2] South Pole, Antarctica has midnight sun and experiences this from approximately 20 September to 23 March (about 6 months). [3]
The South Pole is at an altitude of 9,200 feet (2,800 m) but feels like 11,000 feet (3,400 m). [34] Centripetal force from the spin of the planet throws the atmosphere toward the equator. The South Pole is colder than the North Pole primarily because of the elevation difference and for being in the middle of a continent. [35]
The South Pole experiences this from about May 11 to August 1, [14] while the North Pole experiences this from about November 12 to January 28. [ 15 ] [ 16 ] Polar Sun cycle
The South Pole is the other point where Earth's axis of rotation intersects its surface, in Antarctica. Earth rotates once in about 24 hours with respect to the Sun , but once every 23 hours, 56 minutes and 4 seconds with respect to other distant stars ( see below ).
On December 14, 1911, Roald Amundsen became the first person to reach the geographic South Pole, part of a tragic race against Britain's Robert Scott who died of exhaustion and cold on the return ...
Sigma Octantis is a solitary [9] star in the Octans constellation that forms the pole star of the Southern Hemisphere.Its name is also written as σ Octantis, abbreviated as Sigma Oct or σ Oct, and it is officially named Polaris Australis (/ p oʊ ˈ l ɛər ɪ s ɔː ˈ s t r eɪ l ɪ s /). [10]
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