Unexpectedly Vanishing Quasars Are Mystifying Scientists

Stephanie LaMassa did a double take. She was staring at two images on her computer screen, both of the same object — except they looked nothing alike. The first image, captured in 2000 with the Sloan Digital Sky Survey, resembled a classic quasar: an extremely bright and distant object powered by a ravenous supermassive black …

Continue reading “Unexpectedly Vanishing Quasars Are Mystifying Scientists”