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The Breakthrough That Let Us Measure Galaxies
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YouTubeAgainst All Limits
The Breakthrough That Let Us Measure Galaxies
In 1912, a brilliant observer uncovered a precise relation between the period and luminosity of Cepheid variable stars—now known as “Leavitt’s Law.” By linking a star’s pulsation to its true brightness, astronomers could finally measure cosmic distances by comparing intrinsic and observed light. This discovery became the Universe’s ...
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