HomeMassive black holes may be the closest pair ever discovered, NASA says – Scripps News Massive black holes may be the closest pair ever discovered, NASA says – Scripps NewsAustralia Massive black holes may be the closest pair ever discovered, NASA says Scripps News Supermassive Black Holes in Nearby Galaxy Caught on The Brink of Collision ScienceAlert Hubble and Chandra find supermassive black hole duo Phys.org