#83 Two black holes collided a billion light years away, we detected it on Earth just this year, and it was the biggest ever recorded.

Send us Fan MailA billion light years away, a billion years ago, two black holes spiralled toward each other and collided, we detected its gravitational waves in January 2025. We’ve detected many of these before, but this one was different. It was such a strong, clear signal that we could test laws of physics that had been proposed many decades earlier. It even put Einstein to the test.Follow Cosmic Coffee Time on X for some special contentX.com/CosmicCoffTimeEmail us! [email protected] can request a topic for the show! Or even just say hi!We'd love to hear from you.