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Episode 14: Andromeda's Black Hole

Play Dec 15•4:07

Scientists believe that gigantic black holes exist in the centers of most galaxies, but only two had actually been confirmed. Now we can bring that number to three. Our neighbor galaxy, Andromeda, was long thought to harbor a black hole at its center. Its core gives off X-rays, the likely product of a disk of gas spiraling into a black hole. But the core also emits a mysterious blue lig...

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