Seldom Bucket
Well-Known Member
At the heart of almost every large galaxy lies an object of immense proportions — a supermassive black hole. Up to billions of times more massive than our sun, these titans drive the evolution of the galaxies they inhabit.
Yet astronomers can’t figure out how they got so big. Some appear to have formed as early as 600 million years after the Big Bang, when the universe was just 4% of its current age. From our understanding of black hole growth, that seems impossible. “There is simply not enough time to build such a massive black hole so early in the universe,” said Łukasz Wyrzykowski, an astronomer at Warsaw University. Without, that is, something to seed their growth, he said.
Long-Missing Midsize Black Hole Flashes Into View
Black holes seemed to come only in sizes small and XXL. A new search strategy has uncovered a black hole of "intermediate" mass, raising hopes of more to come.
www.quantamagazine.org