How Astronomers Measured the Edge of a Black Hole | WAMU 88.5 - American University Radio
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How Astronomers Measured the Edge of a Black Hole

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For the first time, astronomers peered to the edge of a massive black hole at the heart of a distant galaxy and measured its "point of no return." Shep Doeleman, assistant director at MIT's Haystack Observatory, shares some of the black hole's deepest (and darkest) secrets.
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