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Episode 164: HubbleWatch for May 2008

Play May 30•6:16

And you think losing your car keys is a pain. Scientists have known since the 1960s that about half of the ordinary matter is missing from the universe. Now they've found some of it in an unusual location. A rare black hole may be nestled in the center of a cluster of stars. And astronomers are recalculating the Hubble Constant -- the rate at which the universe is expanding. Hubble Survey F...

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