This visible-light image taken by the Sloan Digital Sky Survey revealed a very distant galaxy with an active black hole. Researchers then used powerful radio telescopes at the Very Large Array near Socorro, N.M. to weigh the central region of the galaxy. The image at right taken by the VLA shows gas in a young galaxy seen as it appeared when the universe was only 870 million years old.
Credit: NRAO/AUI/NSF, SDSS
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