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[PRE-ORDER] LEAVITT SIGNET RING
The Leavitt signet ring is named after Henrietta Swan Leavitt, who made monumental contributions to astronomy with her research. One of her most striking accomplishments was discovering a direct correlation between a star's luminosity and its period of pulsation. This groundbreaking insight made it possible to measure the distances of stars from Earth, which in turn opened the door to many important discoveries by other astronomers.