@astrophysica_x: A pulsating Cepheid variable star in the arm of a spiral galaxy. The intensity of this type of star varies over regular, measurable periods. The frequency of the oscillation is directly related to the star’s intrinsic brightness which allows astronomers to accurately measure distances. Credit: NASA/Dana Berry/Skyworks Digital #astrophysics #physics #STEM #Science #universe

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Wednesday 29 July 2026 23:18:28 GMT
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