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Supermassive black hole binary

Black Holes

Black Holes Tango in Distant Galaxy

A bizarre X-ray flare first spotted in 2010 could be a signal from two black holes that will ultimately unite into a single beast.

Black Holes

Binary Quasar Is No Illusion

A close pair of quasars in Pisces turns out just that, not the record-breaking gravitational lens that astronomers had hoped.

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