Are astronomers seeing a signal from giant black holes?

Green Bank WV (SPX) Jan 13, 2022

An international team of astronomers has discovered what could be the early sign of a background signal arising from supermassive black holes, observed through low-frequency gravitational waves. These scientists are comparing data collected from several instruments, including the National Science Foundation's Green Bank Telescope (GBT.) Gravitational Waves ripple through spacetime at a lig