Science begins for LIGO in quest to detect gravitational waves

Armed with one of the most advanced scientific instruments of all time, physicists are now watching the universe intently for the first evidence of gravitational waves. First predicted by Albert Einstein in 1916 as a consequence of the general theory of relativity, gravitational waves have never been detected directly. In Einstein’s theory, alterations in the shape of concentrations of mass (or energy) have the effect of warping space-time, thereby causing distortions that propagate through the universe at the speed of light. A new generation of detectors, led by the Laser Interferometer Gravitational-Wave Observatory (LIGO), is coming into operation and promises sensitivities that will be capable of detecting a variety of catastrophic events, such as the gravitational collapse of stars or the coalescence of compact binary systems.