A lot of us have been waiting for a long time to hear this news! The NANOGrav collaboration has announced strong evidence of a background of low frequency gravitational waves emitted from supermassive black hole mergers. Their detection methods are pulsar timing arrays (still one of those fantastically simple, cool ideas I still wish I’d thought of). There’s a New York Times article by Katrina Miller here (“The Cosmos is Thrumming with Gravitational Waves…”), and here’s Yale’s Chiara Mingarelli (one of the team) describing some of what this means in simple terms:
-cvj
