A subtle gravitational-wave “hum” from merging black holes may help settle the cosmic fight over how fast the universe is expanding. Astronomers have understood for many decades that the universe is expanding. To calculate how quickly it is stretching today, researchers measure a value called the Hubble constant. Different techniques are used to determine this […]Space,Astrophysics,Black Hole,Gravitational Waves,University of Illinois at Urbana-Champaign#Black #Hole #Collisions #Finally #Resolve #Hubble #Tension1772455403
