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fundamental star

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noun Astronomy.
one of a number of stars with positions that have been determined accurately and that are used as reference stars for the determination of positions of other celestial objects.
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Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2023

How to use fundamental star in a sentence

  • He introduced new methods for determining the position of the equinox and the right ascension of a fundamental star.

    History of Astronomy|George Forbes
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