If size doesn’t matter, then explain this: The Cosmic Horseshoe is a gravitationally lensed system with the foreground galaxy being one of the heaviest in the known universe, hundreds of times our own galaxy. It is so heavy that it warps space-time to such a degree that the light of a background galaxy is distorted into a horseshoe. Inside that galaxy sits an equally impressive supermassive black hole. According to the latest study, this could be the biggest ever found.

There have been several claims in the last decade about the most massive black holes . They are all in the several tens of billions of times the mass of the Sun and are found in the core of equally humongous galaxies. The uncertainty in their masses is equally big, in the tens of billions of solar masses. But not for thi

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