Polar sequence

(astronomy) a series of stars in the vicinity of the N celestial pole whose accurately determined magnitudes serve as the standard for visual and photographic magnitudes of stars


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    polar star n. See daughter star.

  • Polar wander

    noun 1. (geology) the movement of the earth’s magnetic poles with respect to the geographic poles

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    [paw-luh tsk] /ˈpɔ lətsk/ noun 1. a city in N Belarus, on the Dvina River.

  • Polder

    [pohl-der] /ˈpoʊl dər/ noun 1. a tract of low land, especially in the Netherlands, reclaimed from the sea or other body of water and protected by dikes. /ˈpəʊldə; ˈpɒl-/ noun 1. a stretch of land reclaimed from the sea or a lake, esp in the Netherlands n. c.1600, from Dutch polder, from Middle Dutch polre, […]

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