Definition
A 'gravitational wave' is a disturbance in the curvature of spacetime, generated by accelerating massive objects. Imagine the ripples that spread out when you toss a stone into a pond, but in spacetime. These waves travel at the speed of light and carry information about the movements of black holes and neutron stars. Detecting them allows scientists to 'hear' the universe. They are a key prediction of Einstein's theory of general relativity. 🌌