8. Black hole seen in closest look ever
A supermassive black hole at the center of the Milky Way has wound up in the crosshairs of a virtual telescope spanning 2,800 miles (4,506 kilometers). Although by definition we can't see a black hole directly, we can see the bright region of radio emissions known as Sagittarius A* that's thought to be either a disk of matter swirling toward the black hole, or a high-speed jet of matter being ejected from it. 
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