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Episode 354: Black Hole Confirmed

Play Sep 29•4:45

Cygnus X-1 was the first object identified as a black hole. While many black holes have been detected, the distance to Cygnus X-1 has been determined just recently. Knowing that this object is comprised of two components -- an evolving blue supergiant and a dark companion -- and with the new distance determination, it appears that indeed the dark companion is a black hole. In addition, new ...

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