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Its story

20 Canum Venaticorum is an F-type variable in the Hunting Dogs, that small constellation chasing the Great Bear. Its brightness will not sit still: it pulses gently, like many pulsating stars of its class, while reaching us from 264 light-years away. The constellation is a discreet, almost intimate corner where Hevelius sketched two hounds straining at Boötes' leash. There, this yellow-white sun beats quietly as the Bear wheels overhead.