Полюс мира

Траектории, описываемые звёздами вокруг «полюса мира» в результате вращения Земли вокруг оси.

Полюс мира — точка на небесной сфере, вокруг которой происходит видимое суточное движение звёзд из-за вращения Земли вокруг своей оси[1]. Направление на Северный полюс мира совпадает с направлением на географический север, а на Южный полюс мира — с направлением на географический юг. Северный полюс мира находится в созвездии Малой Медведицы с поляриссимой — Полярной звездой, южный — в созвездии Октант. В результате прецессии земной оси полюса мира смещаются примерно на 20 угловых секунд в год.

Угловая высота полюса мира над горизонтом равна географической широте местоположения наблюдателя[2]. Полюс мира, расположенный в надгоризонтной части сферы, называется повышенным, другой же полюс мира, находящийся в подгоризонтной части сферы, называется пониженным[2].

Примечания

  1. Полюс мира Архивная копия от 15 марта 2012 на Wayback Machine, Астронет.
  2. 1 2 Полюс мира, Морской словарь.

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