Using simulations to measure how radiation from one galaxy influenced black hole formation in the other, the researchers found that the neighboring galaxy could be smaller and closer than previously estimated. (sciencedaily.com)
Yet conventional theories of black hole formation and growth suggest that a black hole big enough to power these quasars could not have formed in less than a billion years. (scientificamerican.com)
It's a big deal to find the direct effects of gravity waves from 13 billion years ago, especially since efforts to find them from more recent sources — like black hole formation after supernova explosions — haven't succeeded. (sciencenews.org)