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Reseachers have seen the best evidence yet for a pair of black holes orbiting each other within the same galaxy.
While such "binary systems" have been postulated before, none has ever been conclusively spotted.
The new black hole pair is dancing significantly closer than the prior best binary system candidate.
The work, published in the journal Nature, is in line with the theory of growth of galaxies, each with a black hole at its centre.
The theory has it that as galaxies near each other, their central black holes should orbit each other until merging together.
Originally posted by SumnerKagan
my money is on the old "a negative plus a negative=a negative" posture.
there is nothing to mix, interact, etc.
maybe it just becomes a slightly larger black hole.