Gravitational wave propagation near a black hole – the silent signals from chilled universe to provide structural design for the universe Gravitational wave propagation near a black hole – the silent signals from chilled universe to provide structural design for the universe. The wave-propagation effects allow the determination of the large-scale structure of the Universe. The measurement of gravitational waves reveals how Waves propagate in the strongly curved space-time of a Black hole. The existence of event horizons are directly be probed. Scientists are convinced that the gravitational wave propagation is a form of silent signal from the chilled universe to structural design for the universe.