variable star

Noun
  1. A star that varies noticeably in brightness (synset 109492282)
    is a type of: star - (astronomy) a celestial body of hot gases that radiates energy derived from thermonuclear reactions in the interior
    specific instances: north star, polar star, polaris, pole star, polestar - the brightest star in Ursa Minor; at the end of the handle of the Little Dipper; the northern axis of the earth points toward it
    same as: variable

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