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Episode 23: Polaris' Third Star

Play Feb 16•4:15

The North Star, that friendly, constant guide to sailors and travelers, is actually the North Stars. Scientists have known for some time that Polaris, though it looks like a single bright light from our perspective, is really a star system. The latest images from the Hubble Space Telescope show for the first time a third star, long hidden in the glare of the other two stars in the syste...

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