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Look: Supermassive black holes close to Earth predicted to collide

So close, yet so far.

NASA via Giphy

MARK GARLICK/SCIENCE PHOTO LIBRARY/Science Photo Library/Getty Images

Nearly every large galaxy houses at least one supermassive black hole at its center.

But what does it mean when astronomers spot two?

Neighboring galaxy NGC 7727 has a pair of black holes at its center, leading researchers to believe it’s the byproduct of galaxies that merged a billion years ago.

ESO/L. Calçada ; N. Risinger (skysurvey.org); Digitized Sky Survey 2; VST ATLAS team; Voggel et al. Music: Azul Cobalto