Fastest known star speeds around Milky Way's black hole at 18 million mph - Space.com

The star S4716 orbits the supermassive black hole at the heart of the Milky Way, coming as close to it as 92 million miles.

Astrophysicists have discovered the fastest known star which is racing around the black hole at the center of the Milky Way. The star, designated S4716, completes an orbit around the supermassive bla… [+3385 chars]

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