15. Ken Croswell describes the landmark discovery of a lone black hole in the Milky Way. Using the Hubble Space Telescope, astronomers identified this massive object by its gravitational effect on light.

April 16
5 mins

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15. Ken Croswell describes the landmark discovery of a lone black hole in the Milky Way. Using the Hubble Space Telescope, astronomers identified this massive object by its gravitational effect on light.

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