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Its story

A blue B-type star burns in the southern constellation of Centaurus, several times hotter than the Sun and many times more luminous. Its light began crossing space some four centuries ago, around the time Galileo first turned his telescope on the night sky and discovered moons orbiting another world. After 437 light-years of silent travel, its cold blue glow arrives tonight, faithful to the era that finally proved the heavens were not perfect.