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The 20 pages that link to Variable star, each with the reason it gives.

• Apparent magnitudeBroader topic: Repeated magnitude measurements reveal its brightness cycle and variability.

• PhotometryRelated: Repeated photometric measurements reveal its brightness cycle and variability.

• Light curveNarrower topic: Light curves classify variable stars and measure the timing and amplitude of their changes.

• Henrietta Swan LeavittNarrower topic: Cepheids belong to this broader class of changing stars.

• BetelgeuseNarrower topic: Betelgeuse is a famous semiregular variable, with multiple overlapping cycles of change.

• Williamina FlemingNarrower topic: Fleming’s plate comparisons helped identify stars whose brightness varied.

• Edward Charles PickeringRelated: Pickering’s observatory made the discovery and systematic study of variable stars a major research priority.

• AntaresNarrower topic: Antares varies irregularly in brightness, a property recorded across its observing history.

• Triangulum GalaxyRelated: Variable stars in M33 help establish its distance.

• MiraNarrower topic: Mira’s unusual behavior helped establish variable stars as a subject of astronomy.

• AlgolNarrower topic: Algol’s recognized variability helped establish the broader study of variable stars.

• Flare starNarrower topic: Flare stars are classified by their irregular intrinsic brightness changes.

• Messier 13Narrower topic: Pulsating variables in M13 help measure its distance and probe stellar evolution.

• Corona BorealisNarrower topic: Several stars in Corona Borealis are studied through changes in their brightness.

• Galactic astronomyRelated: Certain variable stars provide distance estimates that help map the Galaxy.

• Messier 15Related: Pulsating variable stars in Messier 15 help measure its distance and stellar population.

• TucanaNarrower topic: The Small Magellanic Cloud in Tucana offers a rich field for studying variable stars.

• UY ScutiNarrower topic: UY Scuti’s brightness varies, as its classification indicates.

• Gamma CassiopeiaeNarrower topic: Gamma Cassiopeiae’s changing brightness places it among variable stars.

• Mary Watson WhitneyNarrower topic: Variable-star observation was a recurring focus of research at Whitney’s observatory.