starquake
 n.— «While it is looking at a star, COROT will also be able to detect “starquakes,” acoustic waves generated deep inside a star that send ripples across its surface, altering its brightness. The exact nature of the ripples allows astronomers to calculate the star’s precise mass, age and chemical composition.» —“Europe looks forward to COROT launch” Euroean Space Agency Dec. 19, 2006. (source: Double-Tongued Dictionary)

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