ASKAP J173608.2-321635

There could be one or more smaller blackholes circling the super massive blackhole at the center of our galaxy. As the galaxy grew by cobbling up smaller galaxies it stands to reason the blackholes from their centers would gravitate towards the blackhole at the center of our galaxy. Those smaller blackholes would be difficult to detect as they obviously don't emit any visible light. But they could, on their own, emit radiation as they themselves swallow up matter that's in their vicinity.
 
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