The Challenge of Weird Black Hole Mergers
https://skyandtelescope.org/astronomy-news/weird-black-hole-mergers/

When spacetime shivers last only a fraction of a second — as in the case of the massive-black-hole merger GW190521 — astronomers struggle to uncover their origins. The post The Challenge of Weird Black Hole Mergers appeared first on Sky & Telescope .
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