牛顿认为引力是瞬时的,爱因斯坦则推测引力是以光速移动的。利用一次罕见的宇宙星体排成一线,科学家首次对引力的传播速度进行了测量,并给出了它的数值。引力速度是物理学中最后几个未被测定的基本常数之一。确定引力传播速度对于那些试图将物理学上的两大支柱——广义相对论和量子力学——统一起来的理论非 Newton thinks gravity is instantaneous, and Einstein speculates that gravity moves at the speed of light. Using a rare cosmic star, the scientists measured for the first time the rate of gravitational spread and gave its value. Gravitational speed is one of the last untested basic constants in physics. Determining the speed of gravitational pull is not a theory for those who are trying to unify the two main pillars of physics—general relativity and quantum mechanics.