CAMBRIDGE, MASSACHUSETTS: Scientists in the United States and Europe have for the first time paired the detection of gravitational waves, the ripples in space and time predicted by Albert Einstein, with light from the same cosmic event, according to research published on Monday. The waves, caused by the collision of two extremely dense neutron stars some 130 million years ago, were first detected in August by the Laser Interferometer Gravitational-Wave Observatories, known as LIGO, in Washington state and Louisiana as well as at a third detector, named Virgo, in Italy.Starting two seconds later, observatories across earth and in space detected a burst of light in the form of gamma rays from the same part of the southern sky, which analysis showed was likely from the same source. “Imagine that gravitational waves are like thunder,” astronomer Philip Cowperthwaite, of the Harvard-Smithsonian Center for Astrophysics, said in a statement. “We’ve heard this thunder before, but this