<p>A new catalog of gravitational waves more than doubles the known number of these spacetime ripples</p>
Gravitational waves are ripples in spacetime caused by the acceleration of massive objects, such as merging neutron stars or black holes. They provide a new way to observe the universe and can carry information about their origins and the nature of gravity.
General relativity is a fundamental theory in physics that describes gravity as a curvature of spacetime caused by mass. It replaced Newton's law of universal gravitation and has been confirmed by numerous experiments and observations, including the detection of gravitational waves.