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YouTubeNOVA PBS Official
The Discovery of The First Black Hole | NOVA | PBS
A young astronomer set out to study binary stars—and stumbled on something invisible, massive, and groundbreaking. In 1970, Paul Murdin noticed a star in the constellation Cygnus that appeared to orbit a massive invisible object. He later identified the unseen companion as one of the earliest known black holes. 📺 Watch the full 2-hour ...
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