Using NASA’s Chandra X-ray Observatory, astronomers have found evidence for what is likely the most massive black holes ever detected. A massive black hole can be seen at the center of a faraway galaxy in this artist’s concept. Image credit: NASA / JPL-Caltech. “A black hole is an invisible celestial object whose gravitational pull is so strong that neither matter nor light can escape it — it swallows everything in its path like a bottomless...
