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polar sequence

noun

  1. 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
“Collins English Dictionary — Complete & Unabridged” 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012


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Example Sentences

These stars, which are called the polar sequence, all lie in the immediate neighbourhood of the pole.

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Polar Regionspolar stratospheric cloud