Hubble Space Telescope spots double quasars in merging galaxies. Finding double quasars offers evidence that it's possible to form pair of supermassive black holes that may eventually coalesce to produce gravitational waves—ripples in fabric of space—that astronomers will be able to detect in future
https://ift.tt/3wlxVaD via /r/science https://ift.tt/3cO7rXU
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